Thats great. We all know he loves the game, but he has created what appears to be an intentional media circus for the last 5 years regarding leaving the game and coming back. Obviously I'm not a Packer fan but if I were I would feel slighted by him at this point because he EAGERLY pursued playing for the Vikings, and anyone with half a brain knew it was to stick it to Green Bay; otherwise, he'd still be playing for the Jets, who he also screwed over in this process. There are at least 5 teams in the NFL who would have signed Favre for the same amount of money, benched the current starter and given him the same promises the Vikings gave. If Favre's intentions were altruistic, he would have looked at other options.
Picture this example. Derek Jeter forces a trade out of New York because of disagreements with management; and he is dealt to, lets say, the Houston Astros. He plays one season and retires. He decides half way through offseason he wants to play again, but he signs with the Boston Red Sox. How pissed would Yankee fans be at Jeter?
It goes further than the love of the game. To Favre it is almost vendictive for him to be pulling this stunt. In my eyes and to many other NFL fans, he will be remembered for this stunt and his retirement ambivalance moreso than any of his on the field accomplishments.