Anything involving Snape, Chris Brown (so excited for 16), Christian fundamentalists, or Mark Millar comic books. Imaginary casting. Anytime a bit of canon comes out that disproves fanon, like Blaise Zabini being male and black. I love watching wanks about kinks, and the weirder the kinks involved the better. I also really enjoy when people go to one of those constructive criticism boards for people that do role playing and then flip out when people start criticizing them.