I think I have quite a few perfectly ordinary hobbies that share a couple common odd quirks/common themes.

1. I like to make things for myself, and

2, I quite like small, compact things.

For example, I built my own computer, a Ryzen 3600/GeForce 1080 machine...in a very small case, a Fractal Node 202. I have a gaming PC the size of a VCR. Hell even my keyboard is surprisingly compact. I'm not one of those nuts with like a 64 key board or whatnot, i use a Cooler Master Masterkeys Pro M. It has a numpad, but lacks the arrow keys. They've been grafted fairly cleverly into the numpad to preserve the layout you're used to. It's a fully functional board with 13 fewer keys.

My wood shop is a 10x12 shed on the corner of my property, into which I have crammed a table saw, jointer, planer, drill press, router table, miter saw, a laundry list of hand tools, measuring and layout tools, clamps, cans of finish, a rack for stock, and a decent workbench. It can be a little difficult to work inside the building, but unpacking into the hard just in front gives me a very functional workspace in which I've turned out a couple of birch bookshelves and a pair of oak and pine end tables, among other smaller projects.