Shows on the air:
Deadwood
Sopranos
Rome
Arrested Development (not on the air for much longer though
)
Simpsons
ESPN NFL Live
Sportscenter
Lost
Real Time with Bill Maher
The Daily Show
Late Show with Conan O'Brien
Entourage
The Office
South Park
My Name is Earl
Too Late With Adam Carolla
Frontline
Robot Chicken
Inside the Actor's Studio
Nova
Everybody Hates Chris
I watch too much TV.
Those are all on my TiVo and I record the new episodes every week.
Shows off the air or the earlier seasons:
Cheers
Saturday Night Live
Frasier
Seinfeld
Taxi
Twilight Zone
Dave Chapelle Show
Late Show with Dave Letterman
Family Guy
Family Ties
My Favorite Martian
Mission Impossible
Incredible Hulk
Coach
Smallville
In Living Color
Quantum Leap
Monty Python
I Dream of Jeanie
Muppet Show
Soap
Wings
The Addams Family
The Wonder Years
Mork and Mindy
McGyver
Star Trek
Star Trek Next Generation... but nothing after that
....and my guilty pleasure... The A-Team!
Boy do I feel like a couch potato!
IMO, for the most part, TV stunk until the last decade when cable started to push studios to make better stuff. There is a great documentary on the cable channel Trio that talks about all the quality shows that never it past their pilot episode because they were too edgy for primetime viewing. I honestly don't consider much of the sitcoms or late night shows on TV funny (except Monty Python) until Saturday Night Live in 1975 when Bill Murray, Dan Akroyd, Jon Belushi, Gilda Radner, Chevy Chase and others brought it to a whole new level.