Re: playstation, wii, nintendo???
most of the good games are multiplatform in xbox 360.. even though iam huge fan of halo,gears,mass effect,fable,lost odyssey,alan wake e.t.c number of exclusives with ps3 is just too much,sony have like 20 first party studios.they keep on delivering quality games every year..also for newcomers graphics matters, ps3 has the best looking games. best part no need to pay for online unlike xbox 360
anyway as a hardcore gamer from fps to rpg i would own both the consoles 
EDIT:also if ur more into mp,it depends on which platform u have more friends