360
best controls, the 360 controller is near perfect.
95% of multiplatform games are better on 360, most companies make a game for 360 and port to PS3 so none of the PS3's extra power is used.
party chat, its awsome, dispite the people who complain about it
community feel
after playing both PS3 and 360 i can tell you PS3 players are..... terrible at games on adverage.
quality exclusives, i played God of war 3, MAG, demons souls, and uncharted 2.... i would trade all that for gears 3 any day,
i wish MS had more exclusives and i will probably jump to the PS4 if MS doesnt get their act together but until that 360 will remain top console, this gen is almost over its a matter of will MS start investing in exclusives or go with kidnect.