My list of PS3 stuffs to get that I'm working through:
Metal Gear Solid 4
Red Dead Redemption
Child of Eden
Shadow of the Colossus / ICO HD
Metal Gear Solid HD Collection
The Last Guardian
El Shaddai also recently caught my eye although I'm not yet prepared to add it to The List ™.
Course there are others that get recommendations depending on tastes ... like LBP/2, God of War III, Bayonetta, GT5, Demon/Dark Souls, etc.