Fan wise = IA
It used to be WI. However, before/during/after this past IA game, IA took over the top spot. My experience with IA fans in the past was great; good natured ribbing/mocking, name calling, but at the end of the day we could agree to disagree over a few beers.
I can't explain it, but this year they put Wisconsin to shame and were over the top rude/mean/a-holish. I'm a easy going guy, but those clowns got under my skin...and that was before the game even started. It only got worse during/after.
Teams wise= WI hands down