ps3 anyday , i own both , i own xbox 360 since oct 2010 and ps3 since oct 2011

. since i got ps3 i stopped playing xbox . in xbox most common games is call of duty , battlefield or fifa . i rarely see people trying other games . some dedicated fans play halo or gears .
but in ps3 you will find all types of gamers , who play sports or shooters or rpg.
now ps3 has got so many exclusives games u might not need to buy third party games .
plus its blu ray disc so it is scratch resistant.
dvd of xbox are prone to scratch.it is also blu ray player 3d enabled . even u can play most of 3d enabled games.
online is free while in xbox you have to pay for it.
you dont have cross game chat in ps3 . means if other person is playing game u cant talk on mic with him.
ps3 games are readily available everywhere . I see many stores in my city which is not big selling ps3 games but not xbox .
graphics wise both third party games are same . but ps3 scores in exclusive .
my verdict ps3 anyday .
but depends on what you wanna play .