People talk about what a risky business the evaluation of quarterbacks is, and they aren't joking. That minefield is littered with the wreckage of general managers and head coaches' careers who have latched their reputations to the backs of colossal busts. Or the ascendancy of geniuses like Bill Belichick, whose reputation is partially established by a quarterback he passed on 5 times in one draft.
Once a talent evaluator has established that a quarterback has the physical skills to play at the position, and the intelligence to read defenses, call audibles, and in general not lose the game due to plain ol' stupidity, what is left?
The personality of the winning quarterback. Don't hire a private investigator to see if the guy is snorting coke off of a hookers' backside in his down time, hire a psychiatrist to see if the guy is a pain in the ass to play golf with.
Let me explain. I think great quarterbacks share a few qualities, none of which are related to physical skills or test related intelligence. They are, as follows (with credit to grinch11, who jogged this post with a reply over at Fieldgulls):
