So many choices, so many that you already mentioned such as audiophiles, gamers, wine fanatics and Civil War re-enactors.
I’d like to add Japanophiles. The people I’ve met who are really into Japanese culture and language, anime, manga and the like tend to be the geekiest of the geeky; the most socially inept, doughiest or skinniest, borderline Asperger’s-ish geeks of them all. Despite their admiration for a culture that values cleanliness, Japanophiles also don’t seem to bathe too often, based on the funk that permanently wafts forth from the anime/manga section of the local Borders.
Great. You memorized every line in Akira. That places you on the same level as those other students in your computer science classes that have memorized Monty Python sketches. Not only that, but you also know the characters and plots of practically every other story out there. You learned Japanese so you can read anime as it was originally written. You stuff your body into costumes that are several times too small for cosplay conventions. Now take a bath, please.