In each game genre, what is the 360 game to have and why?

Ok dudes, for example....

Shooter:

RPG:

Racer:

Action:

Sports:

Shooter: Bioshock

RPG:Lost Odyssey

Racer: Forza Motorsport 2(will be 3 very soon)

Action: Devil May Cry 4

Sports: NHL 09(10 is shaping up to take this ones place)

Shooter:Gears of War 2 or Halo 3

RPG:Fallout 3

Racer:Forza 2

Action:Ninja Gaiden 2

Sports:Smackdown vs. Raw 2009