I finally saw it. Only now, six weeks after the movie came out, was I able to get a ticket into my city's 3D IMAX theatre. I refused to see it any other way due to this thread.
THE GOOD
The CG was impressive. I noticed a lot of blending of physical props and CG at times and unlike most movies the transitions are not blatantly obvious. I only saw them because I was looking for them and once I stopped I never noticed them again.
The 3D was amazing. While I did notice a few cheap blurring tricks as was mentioned earlier in the thread, all in all I was extremely impressed. Sometimes I felt they pushed it too far and when the images got popped really far off the screen they got blurry and disorientating, but that probably has more to do with my viewing angle in the theater.
What really didn't get any accolades is the physical props. Just like in Aliens, Cameron understands how to make future machinery and environments that consist or more than just illuminated panels and polished surfaces. Thinks like the gunship and those smaller helicopter things looked real and functional just like the landing craft and APC from Aliens.
THE BAD
The story sucked, at every level.
1.) First of all the Navi are probably one of the greatest Mary Sues of all time. It is quite obvious that they were set up as some utopian society that humans could only hope to emulate. However, what exactly is supposed to be so great about a hereditary theocratic monarchy dominated by a warrior culture? This is the problem with idealized native societies, namely that in real life their functioning societies and mores are absolutely repulsive to any liberal thinking modern first world citizen. Despite them trying ti import the personalities of mid 90s Manhattan yuppies so that we can relate to the main Navi characters, there are no redeeming qualities about Navi society.
2.) The Navi are nothing but a big racial stereotype. The nobal savage warrior in love with the environment who never does anything that is motivated by the same base goals of their technologically superior rivals

Its the same thing people do to the Native Americans and it is just as stupid.
3.) There is no evolutionary mechanism that could create that whole biological link thing they do. I had suspended my disbelief until that whole Navi smurf porn thing. They took it too far.
4.) Apparently the Navi have warriors, warriors, warriors, and a priestess. No body makes baskets or pottery, nobody is growing or preparing food, no teachers, no functioning economy of any sort. So why are we supposed to believe the Navi are anything other than a brutal warrior culture dominated by blood lust? Their whole society, as seen on screen, is nothing but warrior




and the simple fact of the matter is that you do not have a society composed entirely of effective warriors unless you have lots of practice at it.
5.) They are quite clear that in order to attain manhood you have to become a warrior, so apparently there are no other respected male professions. It must really suck to not finish training, but then apparently that’s not a problem because if you don't you are simply killed by the dragon creatures. What an awesome enlightened culture they have there. Notice there were no women involved in this test, so apparently it is a patriarchal society too.
6.) I suspended my disbelief on the whole "everything is interconnected" thing, until apparently the trees can sense, select, follow, and then communicate remotely with seeds to sense, select, and follow CONCIOUSLY an new alien dude. Notice there was never any explanation as to why this is, so we are left with the conclusion that god did it, or that Pandora is a giant CONCIOUS collective mind, or that Pandora is a giant CONCIOUS mind that can just manipulate any of its denizens at will.
7.) What’s with the whole body switch thing? Are there so many other humanoid sentient creatures of another species on Pandora that they have been able to developed a codified practice of doing this and apparently it is so common that it isn't considered anything that out of the ordinary?
And more disturbingly, do the Navi normally have random bodies without at dedicated consciousness to use for this purpose anyway? Or do they just let the hereditary elite steal the body from poor proles? Either way the implications of this are horrendous and disgusting, and if I has inclined to feel any empathy for the Navi before it wouldn't have survived ths.
8.) So according to the back story these spaceships transporting everything between Earth and Pandora are the greatest achievement of mankind. Yet despite the obvious implication of this being that it would require the collective efforts of planet wide industry and intelligence supposedly there was no government involvement whatsoever. And despite it being a first contact event with the significance being obvious, not ONE government official of any sort is present whatsoever. In Alien and Aliens this was sort of excusable because space travel was not a new and novel thing and there was a coverup, but no such plot mechanism exists in this movie.
9.) So the Navi are on top of the biggest deposit within 200km eh? Thats nice, but that also means there are OTHER deposits within 200km. But hey, why worry about those, lets just go ahead and slaughter the first INTELLIGENT ALIEN LIFE FORM HUMANITY HAS EVER ENCOUNTERED INSTEAD even thought there is apparently no need. The Navi are a preindustrialized primitive society, what is there planet wide population, 100 million? The point is, are you telling me that there are no deposits on the entire planet that don't have a Navi city built on top of it? I can drive 200km in an hour and half, these guys have orbital travel capability.
10.) In conjunction with #9, once the motivations of your antagonists become comical in constuction and simply illogical to boot, the movie loses all pretense of seriousness in its themes which was obvioulsy a concern of the director. Eventually the villians of this movie end up with the debth of Captain Hook or Dr. Evil and at that point the viewer stops careing about them. Once I don't care about them, I don't care if they are defeated and consequently I don't care if the hero win. A good villian has a logical motive for his actions that the audience can empathize with even if they don't agree with it, which it turn makes them that much more dangerous because you can in fact see the logic in their actions. This was not present in this film.
11.) The little chopper things were copied straight out of HALO3.
12.) The weaponry makes no sense, and my criticisms from earlier in the thread still stand. There is no high rise structure on earth that we can't easily blow over with a minimum of munitions right now, why is this tree so special. It is made of wood, period, its structure is irrelevant. As we see in the movie the human weapons have no trouble bowing wood into splinters as one would expect, so the whole "find me the structural flaws" thing was a LAME plot device. Hell, don't blow up the tree, just burn the damn thing to a cider. This is obviously possible, as the movie shows.
13.) More villain retardedness. So, the reason for not just forcibly moving the natives or simply nuking them from orbit in the first place is the bad press. Yet, they decide to do just that by the most messy means possible
14.) Why did they use an orbital transport, EASILY the most valuable piece of equipment they have with no defensive armament or armor, as a bomber? The gunship was more than capable of fulfilling the same function. ANSWER: "We have this really cool model that we only got to use once, lets get some more mileage out of it." As always, making illogical decisions with no connection to plot necessity yields stupid story telling.
15.) While we are on the topic of orbital transports, THEY ARE ORBITAL, or in other words they can FLY REALLY HIGH. Perhaps the other vehicles being rotary have low cielings by design, but the orbital transport could have tropped tha payload from tens of thousands of feet. And before you say it...
16.) You are right, it would be hard to hit a single spot with an unguided mass of mining charges from a dozen angels, but why would you do that anyway? The weapons we see on the gunship are more than capable of performing the task, so just laser guide a dozen of those in from a dozen angels. And spare me the whole "they probably don't have that weaponry!," BS, they are obviously not wanting for access to weapons.
17) The Mechs make no sense. This is not surprising, because the NEVER make sense the way Hollywood depicts them. For one, they have a giant freaking window. Not a vision slot, not even a porthole, A GIANT FREAKING WINDOW. What the hell is the point of an armored armed to the teeth mech if I have a widow the size of my car windshield exposing almost my entire body? You could literally defeat the whole contraption with a well aimed rock thrown to the head not to mention arrows or the weaponry of Earth!
18.) Speaking of windows, apparently they are selectively permeable to arrows, sometimes they bounce off harmlessly, sometimes the sail right through. It must depend on the humidity, or more likely on whether Cameron can be bothered to actually come up with a logical sequence or not.
19.) Back to the mechs, what exactly was the purpose of the ground sequence of the final battle. We are given no objective, their existance has no connection to the stated strategy of the Colonel, they are literally there for no reason.
20.) I get it, Navi animals are really strong, and some have really thick armor. I get that, and I am willing to accept that the 7.62mm ammunition of Jack's M240 won't hurt those hammerhead buffalo looking things as implausible as that sound. I am not willing to accept, however, that what looks to be a 30mm cannon would not only fail to penetrate the creature’s skin, but als fail to totally splatter the damn thing around the jungle. A .50 call using armor piercing ammo can shoot through 1 inch of steal armor plate, a 30mm round is almost twice the diameter and several times the weight. There is simply no possibility of any creature of any sort withstanding the fire power of those power suits.
21.) So, we have these giant power suits, suits that we crush metal structures with their bare hands and knock down trees, but when engaging in a firefight with a worn out and wounded Navi named Jake, that Navi can parry the blows in a LAME swordfight with ease, not once being particularly overpowered by the suits supposedly overwhelming mechanical advantage. LAME LAME LAME.
22.) Now to Cameron's credit, despite all the hand wringing and lame plot devices the humans win. The Navi armies are crushed and retreating, and the makeshift bomb is about to be dropped. So what happens? Well, we are introduced to the most lame plot device in the history of plot devices. The planet itself decides to attack the humans. No mechanism for this is given, we are never told that the planet has the ability to make conscious decisions, let alone that it has to ability to communicate intimately and COMMAND all the creatures on the planet, including those dragon things who have no way of being connected to that network thing. LAME LAME LAME. I repeat, LAME LAME LAME.
And I have run out of time, more later maybe.