Red Dead Redemption
Heavy Rain
Mass Effect 2
Fallout: New Vegas

I've owned all four for PS3, but no longer have 2 of them.

Red Dead Redemption was fun, but got repetitive really fast...still was fun to ride a horse.

Heavy Rain is awesome. If you've never played it, you need to. 4 playable characters that can die at various points in the story, and the game will continue on without them.

Mass Effect 2 was really fun and I'm glad I played it for the first time last year, or earlier this year. I don't remember, but I posted about it.

And New Vegas is one of my favourite games, even though I like Fallout 3 better.