I only watch a few shows because the majority of them don't interest me in the slightest.
-Lost (Gotta start from the beginning to fully appreciate. Season 5 is starting soon. DVD sets are cheap)
-Battlestar Galactica (awesome sci-fi show, that even people I know who don't enjoy sci fi enjoy. 10 more eps left till the end of it all.)
-Breaking Bad (Superb acting and direction in this crime drama. It replaced Sopranos for me, which says a lot)
-Top Chef (A cook-off reality show. Plenty of drama, and blow-ups from some of the contestants. Shows a lot about what works and doesn't work in cooking. Host is super hot.)
I hear the Wire is good, and so in Dexter but have never watched them. But yeah, thats all I can come up with. I would usually rather watch a movie. But, I never miss these 4 shows. Hope this helps.