Favorite Video Game of all time?

I could never decide on one all time favourite since i played way too many games LOL
Favourite racer: Burnout 3 Takedown
Multiplayer: Halo 3
Coop: Blackops Zombies
Best RPG: Oblivion (id chose this as my all time fav)
Best beat em up: Blazblue CT

Back when I had a PS2 I use to play Crash Bandicoot, Ratchet & Clank, Sly Cooper, Jak & Daxter, and San Andreas.

When i had the PS2 i played PitFall. Shit was the best in my opinion.

Modern Warfare 2 or Battlefield 3, can't decide.