Most of the answers are shows I've not actually seen (younger demographic) but there are a few gems in there and I was wondering about what kind of opinions I'd find here on LJ. A couple from me:
M*A*S*H - Trapper John. Some folks like Frank Burns you were SUPPOSED to dislike but I Trapper John was supposed to be likeable and I always found him more slappable.
Buffy the Vampire Slayer - Angel. So much wangst you wanted to barf.