I try not to play anymore because I wouldn't get any work done, but I really loved the Halflife, Quake, Unreal Tournament FPS games
I was a big COD, im taking a break from it for now till COD6 comes along. Right now i have been playing TF2 and i must say its a pretty fun game diffrent from your usual FPS games everyone should give it a try and its only worth $20.00 via steam.
Ive spend way too much time playing football manager and civilization. Im trying to limit how much time I spend on them now, though. Its too addictive!
I used to play WoW, Dota, and a lot of single player games, loved God of war, Demigod, Fable, Dark sector, Overlord... and the list goes on.