What are my characters' weird hobbies? Collections?

Javier, in FRB-world, collects weird magical objects. He keeps them in his locked basement, away from the eyes of the world, safe and non-dangerous. But that is because he's a Nagual. And Brujo. And general Witch-slash-Wizardy fellow.

Micah Bell probably has a handful of interesting vintage weaponry of varying nastiness in his little isolated cabin in the wilds of whatever state he lurks in, but generally speaking, he's not a collector of things. He's not sentimental enough.

His hobby is his job. He's boring like that. He likes to track down the people he's paid to off. It's fun.

Itahyr Muraidh, canonverse, likes videogames, but he really likes the old-fashioned weird type, on a screen, instead of immersive stuff. But he's from a scifi setting, so that's kind of weird.

FRB verse he's a minor figure, very minor, but he probably procures odd weaponry for the Snake Pit.

Starting in on OCs... what does Lumi collect? Nothing. He has a big collection of knives, but he's not a collector of them as such. Not for fun, he just uses them for work. He has an appreciation of well-made tools.

Marius Kier collects teeth. Don't ask about Marius.

Tait collects books, which are hard to come by in space. Eule, similarly, collects pressed flowers, which are rare for the same reason.

Oh, Marius also plays cards. He's very good at poker.

Wish Wendig likes board games. It's not that odd, but given what he looks like and the fact that he's a people finder and also people-get-rid-of-er for a living, an innocent little board game hobby is weird.

Oh... Rook doesn't collect anything, but his weird hobby is keeping his insane girlfriend out of jail.

Lark's a conman, he collects and keeps the pocket watches of those he robs.

Yeah, looking at this, Marius is the worst.

I love Marius, he's such a bad man

Marius is the best. And also worst. XD