I have quite a few obscure hobbies due to ADHD...
I'm super into collecting vintage analog music equipment. Old analog synthesizers and reel-to-reel tape machines to be exact. I also make music on them, but to be honest that's kind of a secondary thing haha.
I play a little bit of everything. Drums, guitar, keyboard, bass, etc. I'm probably best at drums though and have been playing for the better part of 25 years. Currently in a punk band and a desert rock band.
I'm into programming (web dev is my career) and embedded systems. I make a ton of various things with arduinos/raspberry pis. Often I'll try to combine the two and make midi/cv controllers for my synths.
I got into 3d printing a couple years back and have since been going down the rabbit hole of CAD with fusion 360/blender/etc.
I also got really into making video games for a bit in Unity. Started work on a VR game and have been meaning to get back to it.
Speaking of VR, I'm not a huge gamer but definitely love playing Beat Saber and Pistol Whip (both VR). I'm in the top 1000 or so in beat saber, but I was #1 globally in pistol whip for quite a while. I imagine I'm probably still top 10 at least.
And probably my most obscure hobby: Poi
Most people have no idea what it even is, and once they find out, just assume I'm a rave kiddie. I mean, I kind of am, but I legit love the art of poi.