What's your Civilization preference?

[Sengir]

They're very different in a lot of ways. 5 is typically seen as oversimplified actually, though I prefer it.

Honestly Civ IV's expansions made the game so complicated that Civ V's simplification was desperately needed.

Brave New World did add some really unnecessary mechanics, but overall Civ V feels a lot cleaner and is just a more pleasant experience.