Definitely for Butler, though I'm in a unique situation having grown up in Indy.
Butler is my number 2 team (check my post history on Butler/Hinkle Fieldhouse :p). I've been to probably 4 or 5x more Butler games than Ohio State games as I would regularly attend 3 or 4 with my dad each year growing up. Also, I have quite a few friends at the school, so I was rooting pretty hard for Butler.
Mike Miller absolutely ripped my heart out as a young kid. :(
One of my roommates (also from Indy) is much less of a BU fan and was more "on the bandwagon" for the city, so to speak. He said with under 5, "I don't know what I want more, Butler to win or Duke to lose" then a little later said "I think Duke to lose." I know he wasn't alone on that so it should be an interesting topic.