New to the Playstation 3

hey, i just now got a PS3...and I was wondering what the good "online multiplayer" games are?
Like what does everyone play on the PS3? like people on the 360 play Halo, COD4, and Gears of War.

any tips?

Killzone 2 and Call of Duty World at War in my opinion.

Warhawk's an excellent online multiplayer game.

Resistance 2, Killzone 2, Socom Confrontation, and Cod WaW

KZ2 is the best exclusive

Resistance 2, Killzone 2, Socom Confrontation, and Cod WaW

aznpickle

Killzone 2 COD4, COD:WAW however.