Admittedly, gaming is probably the only thing I could call a "hobby" at the moment. That being said, though, I do also really like playing airsoft, building model cars/planes as well as faffing about with model trains. Plus I sometimes draw, and cooking I do enjoy from time to time.
As for interests that might not fit the "gamer" stereotype: I do have a strange fascination with trains. Plus, I can be a bit of an aviation nerd, and I do have a passive interest in cars. I also am a massive gun nerd, to the point that I sometimes irritate people around me with how I can nitpick every little tiny detail movies, tv shows, video games, etc. etc. get wrong in regards to guns. Plus, I'm a guy and have a boyfriend. Might not be too weird, but considering the stereotypical "gamer" is homophobic as fuck it seems, that certainly breaks the stereotype.
Oh, and I have a massive fascination with British microcomputers from the 80's like the ZX Spectrum, Amstrad CPC, and the Commodore 64. Might not seem too weird since I mainly want to collect those things for gaming purposes. However, considering those three examples I used weren't very popular on my side of the Atlantic, and the fact that I wasn't even alive during the 80's; it still might be considered a bit odd.