Ico/Shadow of the Colossus collection
LBP 1 & 2
Uncharted if that's your thing
DISHONORED!!! (Though the story is cliche so far)
That should get you started.
Definitely the shadow of the colossus collection.
--- The Colossal King
--- The Gravity Queen
Well the beta is up till the 30th, the Uncharted Series, God of War Series, LittleBigPlanet 1&2, Resistance Series, ... pretty much any first party title. I'm sure it'd help to appreciate every character in PSASBR if you tried out each of their series'.
Resistance (please try, it's one of the best FPS's out there, just doesn't get a lot of attention)
Ratchet and Clank
LittleBIGPlanet ( 1 is great (i'd say 8/10) but 2 is quite better (i'd say 9.5/10 only because the community isn't as good anymore))
Kind-of Anticipating: God of War: Ascension, Metal Gear Rising: Revengeance, Aliens: Colonial Marines