Spent many hours playing this game at a friends house. But what I want most desperately isn't even a game. I want the DLC for Tomb Raider Underworld that Xbox got featuring Lara's Clone and the caverns below the mansion.
This post is 100% opinion unless stated otherwise.
i would say The Legend of Zelda. Really its the only Nintendo franchise (until Xenoblade and their purchase of Bayonetta) that i like and i have always hated that it was Nintendo exclusive because it being on PS3 or even 360 would be so much better in literally every way. I have high high hopes that whenever an NEW LoZ game is finally announced for WiiU, it will be BAD ASS.
Left for Dead deserves an honorable mention. I have played the hell out of it but always wished it would make its way to PS3 because im too cheap to get an XBL account :)
god of war is essentially zelda for sony. it has the first party production quality, the puzzles, the combat, and the ongoing story with the gods/goddesses.
Had I been asked a few years ago... it most certainly would have been a 360 game, but since most of those exclusives have migrated to PS3, its going to have to be a Wii game.
I really wish Monster Hunter 3 Ultimate would release on PS3. I'd love to see Capcom take the time to release a console MH game, with dedicated servers, for a Sony system. MHP3rd HD is awesome, sure... but MH Tri and MH4 are wasted potential.
And, the tease (and awesomeness) that is Dragon's Dogma, lacking co-op, only makes me wish all the more for a PS3 MH game.
Playing: ME3, ZoE2 HD, Anarchy Reigns, MGR:R, Sly 4, Borderlands 2 (GOTY 2012) "See You Space Cowboy."