I am a HUGE old/classic movie fan (as are my parents & my husband), so 9 times out of 10 I'm watching the Turner Classic Movies channel (or one of our over-a-thousand DVD's - I kid you not!).
I also enjoy British television, especially British murder mysteries like "Midsomer Murders", "Wire In The Blood", & "Prime Suspect". And of course always enjoyed the Brit comedies "Monty Python", "Blackadder", "Benny Hill", etc.
As far as American tv goes, pretty much the only things I watch are "The Simpsons", "Seinfeld" reruns, "House", & "Monk" - & even then not all the time.
I used to really enjoy Food Network until it turned into the Rachel Ray/Emeril/Paula Deen channel. Now I only tune in for Alton Brown or if someone is making something that truly sounds interesting.
Again - the good old black-&-white classics always come 1st around here.