I associate all but the anime avatars with asshole NTs and maybe some STs. Anime has gotten pretty popular with Gen Z, from what I understand, so it would be more likely more people, regardless of type, would be open to using an anime avatar.

fwiw, I use an anime avatar for my Steam profile (Kurapika from HxH).

edit: Lurkers and creepers could be NFs too. Then again, I've met some NF edgelords, as well.

So maybe it's not type-related after all.