Let's see . .
Buffy the Vampire Slayer (no longer on the air, but still fav)
Angel
Smallville
ER
Monster Garage
American Chopper
I hate those reality shows, but whenever my wife is watching, I seem to get sucked in. :roll:
I also thought these were pretty good although no longer on the air:
Sliders
Quantum Leap
The Commish
Kindred