I actually stopped watching The Walking Dead around the 3rd season, which is about the same time I started reading the comics and eventually got bored of the zombie genre. I've heard the show's gotten even more tedious but I still can't imagine it being as vacuous as HoC's later years (Exhibit A: Tom Yates).

Also, I had meant "Walking Dead" as a favorite of the serials currently available on Netflix and that I personally watched via Netflix. So that leaves out BSG, Star Trek (which I watched years ago), all of HBO's shows, and non-serials like Archer and Futurama. So, most TV :)