No love for the syphon filter series?
Most people missed Logan's Shadow and Dark Mirror, mostly because they gave up on Syphon Filter. Syphon Filter 3 should have been a great game but it wasn't and Omega Strain should have been a new start for the franchise but it failed.
my favorites :
1. God of War
4. Ratchet and Clank
5. Sly Cooper
6. Jack and Daxter
10. Little Big Planet
there are more that i like but 10 are good enough for now, anyways my favorite is God of War, i would put Metal Gear Solid as number 1 but is not exclusive to playstation anymore.