Age of Empires is a much better game than Command and Conquer anyway
I've been playing through GTA: San Andreas again, got all the way to the end of the San Fierro section without much trouble. It helped that I realised losing territories in that phase of the game in Los Santos doesn't really matter, because you lose them all when you leave anyway
On the other hand, considering going back to FIFA08. I wasn't a huge fan of this game when I first got it, but it's turning into one of my favourite FIFAs. It's a shame the new feature where you play as just one player isn't more developed. I'm hoping that in 09 they have a full career option, where you can create a player and work your way up through leagues. That would be a thousand shades of awesome