I used to be an avid tv watcher, but now Supernatural is the only show I watch regularly. I tune into the new Battlestar Galactica and Smallville on occassion....but I don't worry too much if I miss episodes anymore. The dvds will be released the following year, anyway, and I can just get caught up with the shows then.
A lot of shows (especially those on FOX) get canned after thirteen episodes or only a season or two. The DS pilot was the only show the WB ever cancelled/didn't pick up that I was interested in.