Gryffindor: They do live action roleplay and cosplay all the time. Go out in public with merch and costumes and don't give a single shit. Violent fangirls who will beat you up in excitement. Spends all their money on merch.

Ravenclaw: Spends hours on social media looking at fandom crap. Draws fan art and writes fanfic. Makes up witty ship names. Probably lots of gay ships (not saying the other houses don't have them too).

Hufflepuff: They put the "fluff" in HufFLepUFF. They bake fandom-themed cakes. Reads Ravenclaw's fanfics. Ships anything with a heartbeat. Freaks out when new content comes out. Throws those awesome fandom parties that no one else has the patience for.

Slytherin: Gets SUPER insulted if you insult fandom/ship/OTP. Sends the author tweets for suggestions and begs for hints. Binge watches Netflix for two days straight. Writes and reads smut, probably.