I Highly recommend Ratchet and Clank Future: Tools of Destruction
I have it and so far it hasn't failed to give me the laughs and difficulty of the other Ratchet and Clank games.
So far I'm on I believe the 3rd level but its still got the old feel of the other games and plus in this one you find out ratchets past.
Moterstorm is really fun, expecially when you use the 6 axis controller to steer. Hard and yet funny.
Elder Scrolls is a game I love but my brother sold it. I say buy it.
Uncharted is preatty good, didn't play it yet but it looks good.