I can't stand him either, I think he's one of the most arrogant quarterbacks I've ever seen play the game, but the facts are that the dude has been consistently good, and the numbers say he's one of the 20-25 best QB's of all time.
Plus, voters for the NFLHOF don't act like the total pansies in the baseball writers; they will actually vote for a guy based on merit, not whether or not he was a doucher.