Dr. Who is simply awesome... I never watched any of the older ones though, however the new ones have a lot better special affects...
I also watch occasionally
Family Guy
Simpsons
Futurama
South Park
And anything that looks like it could be interesting, such as all of those programs on the Da Vinci Code that were on the other day...
(I still have to remember that there are a lot of people from the states here... Not sure what you guys have on TV over there actually... lol)