I have avoided 24, Harry Potter (books and movies), Family Guy.
Ditto all of these, though I did catch an episode of FG once and hoo boy, what a piece of crap. Totally unfunny. I also feel like 24 would totally enrage me on civil liberties grounds and sheer racist stupidity, and so I've managed to successfully avoid it.
Have not seen Dr. Horrible either, but Joss Whedon is hit-or-miss for me; the Buffy musical made me want to die by shrinking into a little heavy lump of mass, like a dwarf star of embarrassment. Haven't heard No Age, caught one episode of Extras and didn't like it (all cringe, no laffs), watched the pilot for Chuck and thought it sucked. I also watched one episode of Flight of the Conchords and was left scratching my head, even though I've laughed at peoples' descriptions of the show; it's like it's more funny to hear described than to actually watch. I also rented season one of Heroes and couldn't make it past the first episode.
I'll probably wind up hearing some Bonnie "Prince" Billy at some point (I must have some mp3s, maybe from Salon.com?), but I feel like I probably won't like it.