I used to play a lot of Unreal Tournament (classic) and Unreal Tournament 2004 before i got here, but now i has noone to play with :-(… also played lots of rainbow six: raven shield, but i beat it and got slightly bored. Call of Duty and CoD: United Offensive were my favorites too. Ace Combat 4, 5, and Zero (PS2) were good, and i also played FFX and FFX-2. Forgot to mention Tomb Raider: Anniversary. Will still play any of them if I have downtime, but that has been scarce, so i keep to short streaks of cs:s, tf2, portals, halo, etc.
and I recently added Rainbow Six Vegas 2 to that list 