Gameplay or Flavour?

[deadliver]

Better AI is my vote, the one from Alpha Centauri always seemed to give me a run for my money if I didn't hit the ground running.

 

[V3N0M]

Oddly enough, I remember alpha centauri being easier than Civ3 or 4. I could beat SMAC on thinker difficulty but I have never won a game ov civ 4 and only once in civ 3 (Technically I was one turn away from space victory, got bored, and decided to just call it a win and move one)