Suggest some PS3 'Must Have' Games

[Hawk]

I just got a PS3 and now want to pick up some games I've missed out on.

I plan on getting:

-   Killzone 2

-   Uncharted

-   Uncharted 2

I am also considering Little Big Planet.  And ahead of time I understand it is a great game, but I'm not personally interested in getting MGS4.

Is there any other games already out that I may be forgetting or didn't realize was a amazing game I should get?

NOTE: I like all genres other than sports and racing ( unless you get to blow up the opponent or throw green shells at them ).  I tend to like FPS, RPG, and Turn Based Startegy games the most.