Most people seem to far prefer Civ4 to Civ5 (or other iterations of the Civ franchise, for that matter.) Personally I never really got into Civ4 because the Civ franchise has historically been heavy on the micromanagement and I didn't see much indication that they were addressing that for Civ 4; in the end, mods only added more detail to an already overly detail-oriented game.
Civ5 could have been a breath of fresh air for the series if they had bothered testing and balancing the game rather than releasing while it was still only half-baked.
Civ5 could have been a breath of fresh air for the series if they had bothered testing and balancing the game rather than releasing while it was still only half-baked.