The Shield (best show on TV, IMO)
24
Lost
South Park
The Office
I try to catch Family Guy but it's not on the same level as the other 5 I mentioned. I caught a few episodes of Battlestar Galactica on the Sci-Fi channel and it was great too but I just didn't want to add another show to my life. Someday I'll watch those DVDs from the start.
RE: Firefly, my uncle the actor had a couple lines in one of the episodes when it was on TV. He played some interplanetary dignitary guy at this ballroom event thing the main characters were attending. He (and a bunch of the other rich, interplanetary guys) was talking to the ship's mechanic about spaceship engines. Fezmid is probably sick of hearing this story by now.