Graded on 2 things:

Technical- Polys, lighting, AA, shading, exclusive or not (Exclusives are not as impressive as multiplats considering a great developer can squeeze out some marvelous work on several consoles....not to mention PC), and of course the artstyle, frame rate, and fouls like tearing and pop-in. Also- An open world game or a racing game is obviously a better acievement then a 2D game or an indoor shooter. Taking into account all of these things, Here are my top 10.

1-Rage

2-Crysis 2

3-Killzone 3

4-Forza 4

5-Battlefield 3

6-Uncharted 3

7-Blazblue Continuum Shift 2 Extend

8-The Witcher 2

9-Ultimate Marvel VS Capcom 3

10-Gears of War 3

Did not make the cut 11-15:

God of War 3

Metro 2033

Skyrim

Mass Effect 3

Batman Arkham City

Rayman Origins

-