Suggest some PS3 'Must Have' Games

[d21lewis]

As far as MUST HAVES, the short list is:
Uncharted 2
Valkyria Chronicles (if you're into SRPG's like me)

Aside from that, the exclusives I've played are good, but not must have. If you liked MGS1-3, MGS4 is a no-brainer (but still a little disappointing). You said you weren't interested, though.