I mainly watch Halo and Killer Instinct, I did watch a bit of CoD (boring IMO) and Street Fighter.
My favorite Halo pros.
Ogre 2
Naded
iGotUrPistola
Formal
Snip3down
Roy
Favorite KI players
Grimmmz
CDjr
Gutter Magic
Emperor Sleep
Anime Freak AJ
Draman Kuratani (not sure if he still plays)