I don't actually sit and watch it all the time, but I took the advice of my crush-friend and put it on to hear another voice. Being newly single, it gets rather lonely. He said whenever he's home, he just puts the TV on for noise. So now I do it, too. I put on VH1 Classic and if a good video comes on, THEN I sit and watch (or dance and watch!)
I do sit and watch NCIS, Dead Like Me, Ghosthunters, Mythbusters, and Doctor Who. Sometimes I'll watch Star Trek or Star Trek TNG or the Twilight Zone, when they're on. If I feel like watching something and there is nothing on, I'll put in a MacGyver DVD or a movie.