I would honestly have to say Star Trek The Next Generation. It was the only Start Trek I ever thought was any good. I think the combination of the writers and the cast drew me in. The cast had a very dynamic inter-relationship that washed very well.
The only TV show I've watched in the last several years has been Stargate, only because my father was always watching it, and I was a big MacGuyver/Anderson fan when I was very young. And the jacked black guy was pretty cool, too.