Valkyria Chronicles is one of the best 5 games on the PS3.

Do you like Dragon Quest and Pokemon? Because Ni no Kuni is roughly half of each, with a dash of Earthbound. Not always the best parts of those three, but hey, I enjoyed it.

XCOM: EU is what it is, which is in the upper tiers of games, but not really a "must-play" like the original was.

Fallout: New Vegas is my last official recommendation, pretty surprising to me that no Bethesda games are on your list, and New Vegas is far better than Fallout 3 and somewhat better than Skyrim.