Fairley is definitely a very dominating force. He doesn't like to stop until the whistle blows which is good and bad. There were a lot of QB hits after the ball is gone in that video. I really like his passion for the game and would be happy to see him in a Bill's uniform. I'd be a little worried about his over zealousness though.
I could just imagine Brady getting up and pointing at him repeatedly in a game, throwing up his hands and begging for a flag. Kind of an amusing vision in my head.