I used to have a work friend back when I was living in CNY who rooted for:
- FSU for college football
- Atlanta Braves in MLB
- Dallas Cowboys in NFL
- Chicago Bulls in NBA
- ... and Syracuse for college hoops
This was in the mid-to-late 90s. All of those other teams were at their peak, winning championships [more or less]. I used to give him a lot of grief over his "life long fandom" of all of the teams that were on top at that particular timeframe.
It also drives me nuts how the enormous Irish population in Syracuse [and I'm part Irish] who actively root for Notre Dame -- even over Syracuse. Makes no sense to me whatsoever, and makes me loathe ND even more.