1 ME2
2 ME1
3Metal Gear Solid 4:/ Bioshock

1) Uncharted 2
2) Modern Warfare 2
3) Metal Gear Solid 4

1.) Metal Gear Solid 4
2.) The Last Remnant
3.) Tie between Mass Effect 2 and Uncharted 2

I'm sure my list will change once I actually play the games I have....

of the ones I played extensively:
MKWii
Gears2
NSMBW

Metroid Prime 3: Corruption
Call Of Duty: Modern Warfare: Reflex Edition
Super Mario Galaxy

honorable mention

Dead Space: Extraction

Only 3?

1.)Super Paper Mario
2.)Smash Brothers Brawl
3.)Tales of Vesperia
--------
4.)Ninja Gaiden Sigma
5.)Uncharted 2
6.)Bayonetta
7.)Mario Galaxy
8.)Zelda
9.)Dragon Quest IV
10.)Devil May Cry 4

I cant really pick 3 of my favorite as ive tryed but then another game always springs to mind so ill just put some down but it's in no order.

-Demon Souls
-Uncharted 1+2
-Valkyria chronicles
-Oblivion
-Warhawk (it never really kicked off this game but ive had alot of fun playing it and always go back to it for a quick blast)
-Bayonetta (only just started playiong this but i can tell once i get a bit more familiar with it that ill really like it)

Assassin's Cread

Uncharted 2

Grand Theft Auto IV

Hmmm interesting question.

Off the top of my head?

Left 4 Dead 1

Fallout 3

Wii Sports games. WS and WSR. I know this last one is kind of a cheat but I'm going to do it anyways...=0)

I would have loved to play left 4 dead...but no 360