Define best and worst
Best as in "loyalty"? Find another program with the lack off historical success yet has the attendance UK does
Best as in "most pleasant to be around"? no idea
Worst as in "whiny, expect too much, etc"? Probably Bama in football, UK in basketball
Worst as in "entitled, obnoxious without accomplishments to substantiate it"? Ole Miss, USCe
Admittedly, my exposure has been a poor sample as I have not travelled to the opposing schools, but this was based on my experience around fans in general and message board/blog comments.