I've been PS3'ing alot lately...I just picked up Resident Evil 5 too, about to pop it in, looks amazing..I used to have COD4, but now I'm on COD World at War...I think it's as good as 4, though most prefer 4. Gotta love the dogs!
I had Killzone 2 for about 8 days, but the control is so awful and online multiplayer is poorly developed, so I traded it in. I have SF4 too but stopped playing because I just can't pull off moves on the control pad or fightpads that easily, I need to track down the Tournament Edition FightStick for PS3