OK, other than my obvious Star Trek obsession - TOS, TNG, Voyager, Enterprise (every incarnation except Deep Space 9), my other favorites are:

The Twighlight Zone
Outer Limits
Wild Wild West
Combat!
The Man From Uncle


Comedies
Taxi
Cheers
M*A*S*H
Seinfeld
Two And A Half Men (although the show and the whole Charlie Sheen thing is wearing a bit thin).

I'm sure I'll think of others, but these come to mind quickly.