I don't mind high school shows as long as they're entertaining (such as Glee). And I like Gossip Girl, although I have to correct you -- they are now in college. It doesn't really change the premise though. However, I can't stand the new 90210, and won't get anywhere near Melrose Place.
And I agree, there are too many medical and crime procedural shows on TV nowadays, but the old people like them I guess. Do we really need Mercy, or Trauma, or NCIS: LA?
I can't get myself to watch Flash Forward. There's just no more room in my brain for another show like Lost.