I have Civ 3 and 4. Had 4 the day of release, and still have yet to play a successful game after about 30 tries... no lie. Its bugged to hell and a joke it made it to the salesfloor in this condition. The boards are buzzing right now over peoples inability to even get it to load let alone play.
Recently after new drivers I have been able to play a small game with some reall insane terrain graphics. I loved Civ 3, Sid & Firaxis outdid themselves on it. It seems the game is more aggresive now which I like, as far as barbarians go, but I always turn the heat up with them. On 4 it really is very noticable, non stop assaults.
The graphics look nice but IMO 3 wins the graphics contest with some minor exceptions on 4. 3 is like an amped version of 1 we all fell in love with, me on my super nintendo... ahhh. [End Turn] and wait 10 mins for your turn again (usually trying to get a little sleep in that time, sometimes passing out to wake and pick up where I left off.... kinda sad but true nonetheless.)
I think 3 really captured what sid created originally. Civ4 is where the game has officially evolved into a new being. We may see an 'Old Metallica/New Metallica' thing surface from it. I too think the units are mighty big.
All you people choosing Civ 3 over Civ 4 due to reqs and not personal opinion, dont sweat it too much. Through the gameplay I experienced, with florescent dirt and really...just ... weird ocean tiles (mostly pitch black) Gameplay has a new feel to it, that isnt the same classic game we like. Its just the same brand.
I wont say its bad, but its definetly different, you will have to experience it to decide for yourself I think. I pre-ordered, and my week has been hell trying to get it to run cause, well, its too late for me I done bought it and I know I aint gonna take it back. Hell, I put too much work into it now.
Just thought I would kinda drop in an extra opinion, and let you guys know that if you havent played it, at this point in time neither have most of us that bought it, and those who have are usually having graphic issues anyway. Lets give it time, and see what happens.