I'm biased for my home team (live literally a 5 min away drive from the campus); the USF Bulls. Never did like the old jerseys, but the new ones with the white helmets and green piping are class.
Clean, understated, not overly flashy.
I also like Penn State (clean, plus blue is my favorite color), Boston College (a lot like Penn State, but w/ diff colors), SMU (really cool old-school retro look) and Michigan Sate (again, retro. Plus clean colors).
The only flashy ones I like is Maryland, simply because its not random, its about state and school pride. Plus the turtle design on the helmets/shoulders are BA.