During his Packers years and the Jets year and the 2009 NFC Championship game, he was one of my favorite players to watch. I think if the Packers wouldn't have won the Super Bowl in 2010, my feelings might be different out of bitterness maybe ... I would like to see his number retired. I just feel he'd get booed and that personally would be a shame in my opinion. I would like it if they were able to use Aaron Rodgers to lead into Brett Favre some how to get the crowd going. I say Aaron Rodgers because I think if fans see and hear that Aaron Rodgers is excited about Brett Favre's number being retired ... I think the fans will feel the same more so than they would otherwise.
I think there are several views of Brett Favre.
Brett retired, Brett wants to come back, Packers were committed to moving on. Brett is traded to the Jets although he was expecting to be traded to the Buccaneers. (which if he were, I don't think he ends up on the Vikings ever). Brett's year with the Jets starts out good, ends in disaster. He gets released and the best team in the NFL that is only missing a QB comes calling ... therein lies the problem with Packers fans ... its the Vikings.
Brett probably sees it as, hey, Vikings were the best team in the NFL that just needed a QB and it afforded me an opportunity to prove to the Packers they made a mistake by not letting me come back.
Packers fans who have "turned on" Brett, probably see it as Brett only came back to stick it to the Packers and did so by using the 2nd biggest franchise rival in doing so ... the Vikings.