im a fan of Sony but not a fanboy who cant recognize when they have fucked up, that being said as for the other two... they do have one game here and there that looks good but they fail to satisfy my gaming needs as much as Playstation does.
for example:
i love both Japanese and Western games and Playstation gives my a LOT of both (heck the PS3 is still getting japanese exclusives), and i also love new IPs and Sony has always been really focused on that as well.
Now if we look at Xbox they focus totally on big AAA western games and they have an almost complete lack of Japanese games.
Then we have Nintendo which has mainly the IPs and games that i either stoped caring after i grew up (like mario) or i never actually cared about before and now (like Starfox, Donkey Kong), that being said they DO have some games that im interested on their system but as of right now its just three games (Bayo 2, W101 and Xenoblade 2), plus if we add the fact that they lack Western exclusive games (like Uncharted, Halo, GOW, Infamous, TLOU etc) and the fact that they lack third party support then they dont even come close to filling my gaming needs...
and thats why i game on a Playstation.
PS: i also never Troll/Flamebait/provoque and or downplay the awesome stuff the other consoles do have, and i hate fanboys even the ones on PS side, because they end up making us look bad...
