I would suggest Killzone 2 (and to a lesser extent 3) for your list if you have interest in the FPS genera. I was pretty surprised when I finally picked it up how fun Killzone 2 can be, and kicked myself for not picking it up sooner.

I can also personally suggest:

Metal Gear Solid 4 (although its really a game for hardcore MGS fans then anyone else)
Valkyeria Chronicles
Little Big Planet
MAG
Grand Turismo 5