Probably list of top 3 for me would be:
Ole Miss
UGA
UA/AU toss up...

Ole Miss is amazing... edges out UGA by just a little. UGA if it were laid out a bit better or if South Campus didn't suck so much, could easily be atop the list. North Campus/DT area is best area of any college town I can recall visiting though I've also heard amazing things about Pepperdine and Princeton as mentioned earlier.

UA/AU... not really sure here. Spent more time in Auburn by a lot and enjoyed it but on my last trip to T-town I had a good time and thought it was nice as well. Still haven't been to Fayetteville.

UF would make the list if I was only interested in the female quotient on campus because the "scenery" is amazing, but campus is pretty meh if you ask me.

Knoxville... dump...ster fire. Claim to fame: Body decomposition study area.

Cootlumbia: Awful... just awful. Almost as bad as the upside down roach that is their football stadium.

Starkvegas... never been. Haven't been convinced that I should.

Lexington: I'd go but I always end up going to the Gorge to climb instead.

Vandy: underwhelming campus but I love Nashville

Red Stick: Never been... maybe 2014?

Newbies: haven't had the chance to visit Mizzou yet. Didn't love the campus at aTm but didn't hate it either... not making the top of the list for sure.