On offense I'm gonna say/hope it's EJ Manuel. If the Bills can get even slightly above average from the QB position, it could turn out to be a very entertaining and successful season.
On defense I'm gonna say Leodis McKelvin. Last season McKelvin was hampered by injuries playing only 10 games and still lead the team in ints. with 4. With teams not wanting to test Gilmore (hopefully), McKelvin should have plenty of opportunities to turn in some big plays.
I didn't see the post before this one by better days saying basically the same thing. I guess great minds think alike. lol