Games with wonderfull online play!

What are the good online games for the PS3 i have had my PS3 since a week before x-mas and im haveing trouble finding a good online game other then resistance fall of man..... (please note that i have had an xbox360 since last year but this discussion will not be about the 360 at all)So please give me some advice on games with good online play, Also every 1 post your personal favorit online game too =D

Staiting one good thing and on bad thing about the game is recommended

Well, I'm enjoying Warhawk on daily basic for a long time now. The only other games I'd pop online time to time would be Call of Duty 4, Unreal Tournament III and NBA Live 08.

But Warhawk mostly for me. I'm a big fan of Battlefield 1942 game types and Wawhawk adds more to it. I can't seem to get bored in that game :)

Cod4 is fun but can get old sometimes, and warhawk is definetly up there I'm actually trying to get mine back really. I do like playing orange box for tf2 (i love the other games as well) its rather addicting and if you find us servers on tf2 alot of ppl usually talk.

Warhawk

pros- fast paced, insane fun, splitscreen + online up to 32 players, lot of variety (tanks, planes, infantry, turrets, etc)

cons-umm... some people say it has a steep learning curve