Starkvegas, UT (all of the big 3 sports), & UF, but I've run into fans from every school. Based on the fans I've been around, I would say:
1) LUS (God's gift to FB)
2) UAT (God's other gift to FB but a bit more sober than the avg LUS fan)
3) UM (only if you're MSU or you just beat them on a 'controversial' play; otherwise move them down to 8 or so)
4/5) UGA/Aub (a sense of entitlement that they're just better than us, which is true)
6) UF (I really enjoyed talkin' smack with them accompanied by a UAT fan at the 97 UT/UF game)
7) UPig (worst lookin' bunch of fans I ever saw show up @ Scott Field)
8) UT (I'm a UT grad & they treated me pretty decent while up there; worst fans are in Tenn. Valley area, not Knoxville area)
9) MSU (we got our share of a-holes, the previous 8 got more than their fair share)
10) UK (much higher for bball, where they have 'tradishun')
11) VU (a few wisecrackers, but generally more obnoxious about their over-valued education => at least in my engineering world)
12) USC (never met one that was too bad; mebbe if I told them Clemson was modeled after MSU?)