What made you a Packers fan? Were you raised in a family that are fans? Is it because of your location? Do you personally know the players?
I briefly lived in Wisconsin during my Army career, but, the main reason is this: When your childhood coincides with the rise of the Vince Lombardi Era and your own family knows what it means to be a success as an Italian-American, your bound to get attached in a very personal way, to the Green Bay Packers.