to accept any responsibility for any L he took, the unwillingness to set his own personal feelings/bruised-ego aside to work out certain situations instead leading to 'him or me' speeches along with a divided locker-room, his refusal to meet/work with his new teammates in any offseason workouts or mini-camps unless they came out to play catch with him in Arizona, his need to establish himself as a Quarterback eventually leading to him nearly completing disregarding the mobility that gave him an extra dimension as a collegiate player/early-NFL-MVP-candidate, him continuing to fashion himself on Brady/Manning level when he hadn't been a top-tier QB for at least the last five years of his Eagle career later leading into him not being able to put in the work necessary to succeed in his final two terrible stops after that, etc.

Please don't think that because McNabb was a politician in the press that there isn't plenty of ego inscribed into the 'Book Of Donovan'(c)Sam McNabb. It just manifested itself in different ways then it did a guy like Brett Favre.