All the Dr. Who avatars are beginning to annoy me. It's becoming more obsessive a fad than the bronies.
Dr Who, Mass Effect and My Little Pony. Possibly the unholy trinity of utterly insufferable fanfucks on the internet. Maybe throw in the Loki fangirls if you really want to up the potency.
Though in all fairness, I don't mind the avatars so much. In fact, Dr Who fans tend to be pretty well behaved around here. Plenty of avatars, yet no ungodly Dr Who related gushing in various threads that other people have to wade through, which is more than can be said for the other two.
All that said, fandoms in general annoy me greatly. Whatever happened to the idea of simply liking something without having to incessantly broadcast it to people who don't give a shit?