I think you have to call Brett Favre a great QB. He is definitely in the top 20 of all-time without debate. That is great. Period.
It was the "beyond great" thing that I took issue with. I do think that Favre's greatness is exaggerated because of his personality and style of play.
The 3 MVP's don't carry as much weight with me personally because I think that they are also a product of what I mentioned above. He was in a stat producing offense for a QB, because he threw the ball a lot more inside the 5 than most guys would. And his personality endeared him to fans, players and media.
I think he was a great player, with the weaknesses that I made note of in an earlier post, definitely in the top 20 QB's of all-time, but overrated (in my opinion) because of his personality and flair for the dramatic. His strengths were always played up, his serious weaknesses were always pretty much ignored, but they hurt his team in some big games.