I have so many, its hard to choose. Here is a small selection of my favourites over the past couple of years.

24
Stargate SG-1 and Atlantis
The Sopranos
Firefly
Numb3rs
Prison Break
House
Boston Legal
TNG
The Shield
Battlestar
Lost
The Unit
Farscape
Eureka

I think thats about it. Lists like this show me how much time I spend watching TV!