Lets see:
Paramore wiith COD 4 and KH 1.
Day26, Rick Ross, and Matt & Kim with Halo 3
I can't play Rainbow Six with music.
And it would be retarded to play music with Rock Band 2
Paramore with pretty much everything else, KH II, FF VII, Afro Samurai etc.
EDIT: The Afro Samurai soundtrack isn't too bad, but there's 2 or 3 songs that I don't like, which is when I play my own music.