Not sure where you got that he was selfish or even mouthy. As I understand it, he fought to keep the football program at Tulane alive, when he could have saved the effort and transfered to a college not in a podunk conference. To me, that would have been the selfish thing to do, jumping ship for a big school rather than fighting to stay in a bad football program.
The fact that he left UCLA because he wanted to be on his own, and then showed the leadership to save Tulane's program seem to be in line with the positive reports that we're getting from the Bills about his dedication to learning the system.
I'm not really worried about his attitude.
Of couse, he could have the read/recognition skills of a Bledsoe/Johnson hybrid, which would end the Losman era pretty quickly. That's the thing I'll be interested in come training camp and preseason.