You've all mentioned a few of my faves already...but, here are some that haven't been mentioned (or, if they have, I missed 'em)...most of my faves are from cancelled shows..
Stark Raving Mad
My So-Called Life
X-Files
E.R.
West Wing
Queer Eye For The Straight Guy ("things just keep getting better"!)
Frasier ("tossed salad & scrambled eggs")
Mad About You
and going back further:
77 Sunset Strip
Surfside 6
F-Troop