Yeah, so, as I see is a popular trend lately. The Slim came out and I bought my first PS3. And ever since this momentus occasion I've been slowly formulating a list of games I "had" to pick up. After a lot of trimming (cut off a lot of rentals), I've come down to a nice big list. This includes future games, but here we go (in no particular order)...
 
~ inFamous (already have) 
~ MGS4 (already have) 
~ Uncharted (already have) 
~ BlazBlue (already have) 
~ Demon Souls
~ Uncharted 2
~ Brutal Legend 
~ Valkyria Chronicles
~ Dead Space
~ LBP GotY
~ Fallout 3 GotY
~ Call of Duty: Modern Warfare 2
~ Heavy Rain
~ Guitar Hero OR DJ Hero
~ God of War III
~ Final Fantasy XIII Versus
~ Super Street Fighter IV
~ Marvel vs. Capcom 2
~ Bioshock 2     
 
You should also note, some games you may expect to see on this list, I probably either already played on the 360, or don't feel it's more than a rental. 
 
 
Let me know what you guys think, and maybe tell me what your ultimate list would look like.