Hmm, I don't really watch a whole lot of regular TV anymore. I'd have to say, my favorite show is Intentional Talk on MLB Network.
I pretty much have MLBN on in the background for the whole day. Baseball ftw.
When I do watch other shows, I enjoy some of these:
NCIS (the original)
Law & Order SVU
Bones
Burn Notice
Victorious (lolteenagegirl)
I watch pretty much whatever's on, if I have to. But generally, I pretty much only watch sports. Mostly baseball, football, and basketball.