I do not like SOH because it comes really late in the game, and really late for a cultural victory
Even if you were at a Domination Victory and you REALLY needed a policy you won't reach because of the highly increased cultural cost, the hammer cost is absurd.
From any perspective I try to look at it, it is useless, so there goes my down vote
The free policy is almost incidental - the more important effect is +50% culture in the city where you build it. It's not always critical for culture victories, but if you're going for the conventional tall + landmark spam + Freedom finisher approach, that 50% is a huge boost, especially late in the game where spiralling culture costs of new policies can make it touch or go if you'll get there in time. You just need to plan around making your core culture city a coastal city in anticipation of needing the Opera House.
As for the CN tower: It could be a nice wonder. +1 and +1 pop AND a free broadcast tower everywhere is nothing to sneeze at. But like the Great Firewall, it comes 1-2 techs too late...
I'd prefer the pop/happiness ability to be on a different Wonder, because the CN tower is plainly designed to benefit a wide empire - yet it's tailored to culture at a point in the game where you have all the policies you need for most victory conditions, and so will only want it for cultural victories. And most cultural players play tall. So it's interesting but a bit hard to see anywhere it fits in most strategies.
Petra: If there is one wonder that can completly change your gameplay, than it is this one.
I'm not sure I'd say it changes my gameplay, in terms of the way I play, but it shares one thing with few other Wonders (and only one of those - Hanging Gardens - Classical): if you get it, and have the right city placement, it drastically improves your chances of winning much later in the game. It's a very long-term Wonder (and not just because it keeps giving once you research Archaeology - it shows just how weak Terracotta Army is that Petra gets the exact same effect as a free incidental bonus. Plus an amphitheater and its own +1 culture, all in addition to its main effect and a valuable GE point). Most other Wonders, at most game stages, give you a fairly immediate bonus or one that's valuable but not necessarily game-changing.
And if you get both Wonders - Hanging Gardens and Petra - in the same city (great tile output + lots of population growth to work those tiles early), you basically have won the game.
Leaning Tower of Pisa - a free GP of your own choice in this mid-phase in your game and the added 25% GP modifier in all cities. Can have a huge effect and a GE wil bag you another wonder, essentially for free. LToP -> Porcelain Tower is a great gambit.
Indeed, and I did exactly this in my last game. Leaning Tower is certainly among my favourites, while PT has two things working against it that prevent me voting for it: firstly, it's just an expensive Great Scientist on Duel maps, one of the Wonders that is heavily-dependent on game settings. Secondly, yes it's an automatic go-to, but for that reason it's a bit boring.
GMOD- fairly pointless in my eye. You can do similar things in many other ways. When I tech up to GMOD I just yawn at my options.
It has one key use: Interfaith Dialogue. For that reason I prioritise this Wonder when playing religion-heavy; besides which you are almost always going to be in a situation at higher levels when you can take one Theology Wonder but not the other, since someone else will grab the other. Hagia Sophia can be a quick boost in the right circumstances, but it's harder to get than the Great Mosque and has no long-term benefits. The GE point is also more useful than the GA point for most playstyles. Oh yes, and given the choice between a free temple and a free mosque, which would you choose? HS should probably give a free cathedral.
My votes for the new day:
Alhambra 22
Big Ben 23
Brandenburg Gate 20
Chichen Itza 23
CN Tower 10
Colossus 19
Cristo Redentor 21
Eiffel Tower 24
Forbidden Palace 20
Great Firewall 0
Great Library 22
Great Lighthouse 20
Great Mosque of Djenne 18
Great Wall 7
Hagia Sophia 20
Himeji Castle 20
Hanging Gardens 22
Hubble 24
Kremlin 17
Leaning Tower of Pisa 22
Louvre 21
Machu Picchu 21
Neuschwanstein Castle 22
Notre Dame 22
Oracle 25
Pentagon 8
Petra 24
Porcelain Tower 21
Pyramids 22
Sistine Chapel 20
Statue of Liberty 21
Stonehenge 23
Sydney Opera House 18
Taj Mahal 22
Macchu Picchu: Based on my above, I'm tempted to - and really should - vote for Hanging Gardens, but I'll go for MP because it seems underappreciated so far. I always beeline this Wonder when I have mountains; even with only a small number of cities it can give you a drastic early economy boost, and obviously the wider the empire the stronger the Wonder.
Great Wall: I'm somewhat disinclined to vote against the GW but, well, I never build it, something I can't say of
any other ancient/classical Wonder. I never have any incentive to against the AI, and if anything it's a bad design by promoting poor play - your units are out of position? Just slow the enemy so that you can get there in time. You settled in the flattest part of the map, without any difficult terrain blocking enemy access? They'll count as being in hills anyway, so why bother with defensible positions? Things that can come back to bite you once you've teched to Dynamite (as this is the only remaining Wonder in Civ that becomes obsolete, at least technically). On higher difficulty levels, it comes too late to slow the early rush (unless you beeline Masonry and build it immediately, but if you do that you haven't built any units to take advantage of its effect), and after that you don't usually want to be on the defensive if any wars break out; even if you're the one being attacked you should be doing well enough to push into the enemy's territory. True, it does slow the enemy around your new conquests (if they're surrounded by flat terrain), but above all the Great Wall is overhyped - this is still a fairly mediocre effect that doesn't do a lot the terrain itself doesn't.