Originally posted by KnightOfNi:
3) I suggest you refine your original question, Andu. Do you mean in a single or multiplayer, do you think the level makes a difference.
Actually, for a simple poll, the responses to the question reveal much about different styles of play. While most will agree that the Happiness wonders (Gardens, Chapel, Cathedral, etc.) are of critical importance, the choice between Colossus and Pyramids can almost define an individual's style of play.
If a player spends most of the game in the Monarchy --> Communism/Fundamentalism style of play, the pyramids is not only the logical choice, it is a critical necessity in order to maintain growth rates. And in this style of play, the full benefits of the Colossus tend to get lost. Likewise, if you employ the Super Growth/ICS "strategy", then the Pyramids are a great help.
If a player spends most of the game in the Republic --> Democracy style of play, the pyramids become more of a convenience than a necessity, since "We Love the Consul/Prez/PM" day will guarantee appropriate growth. And in this style of play, the full benefits of the Colossus can be fully exploited. Likewise, if you employ a strategy that emphasizes full economic development of 15 or so cities, then the Colossus is the way to go. (This tends to be my approach; "Give me fully developed economy of 12 to 16 cities, and I'll give the world!")
One thing about the Colossus, however, is that its full benefits really only kick in during the mid-game; that is, it is when your cities reach a population exceeding eight and have trade routes connected to the Colossus city that the Colossus begins to effect trade in other cities. Which is to say, properly exploiting the benefits of the Colossus requires forethought and strategic planning; while the Pyramids requires little or no planning to enjoy its benefits.
As for single versus MP play: while I've never played MP, I suspect that an intelligent human opponent will tend to force a player toward the Monarchy --> Communism/Fundamentalism style of play;
ergo, the Pyramids would probably be more useful than the Colossus.