Sid Meier's Civilization 4

Recently bought and just completed Sid Meier's Civilization 4, or Civ 4 for short. I must say the game is slightly over-rated. Don't get me wrong, it's good...but just not great like many people says. However one thing the game got is high replay value. The leader you are playing as seems to make a lot of difference in the game. Good game though.