I used to take some issues with the way Cam carried himself, but I've mostly gotten over that (I think he's dialed certain things back since his first few years in the league). What epitomized what I didn't like earlier in his career was his emphatic first down celebration in the waning minutes of an absolute blowout at the hands of (Eagles or Giants I think, can't remember). A lot of the things people criticize Cam for now are either outdated (he doesn't do those things anymore) or stupid (who cares what he wears to the press conference...have you seen the NBA?)
That said, I don't think there's any way you can put him in the conversation with Tom Brady, Drew Brees, Aaron Rodgers, or probably even Russel Wilson although that one is closer. When Cam is playing lights out consistently, like the year we made it to the Superbowl, or the beginning of last year, he's comparable to those guys. Obviously he is a unique athlete in terms of what he can do with his legs, and in that phase of the game he is elite. Where he falls short of those other guys is the major inconsistency in the passing game. I don't think the running ability quite overcomes some of those deficiencies/inconsistencies.