Can anybody give me a word that can describe a person who has a strange hobby
Well a good word for a strange habit or quirk is idiosyncrasy. That's all I can think of off the top of my head-
I get called weird, bizarre, and unusual because of my obsession with rats if that helps.
I don't think there is...
Queer meaning awkward or indifferent.
Unique is friendly word. No risk involved!
Lizzy nailed it.
lizzy gets a star! she got it spot on.
Supervillain...! What? Supervillainy is sort of a strange hobby.