Alright, things that are
not work:
- I finally decided to buy a VR headset (Valve Index), and have been absolutely thrilled with it. I am very into Beatsaber currently, and I was also very happy to find out that this all works on linux pretty well, so I don't even need a Windows desktop (in fact, all four VR games I have tried so far worked out of the box with Steam proton, thanks Valve!). It's also helping a lot with exercise habits, and I'm burning an average of ~450 calories a day from it currently and have nothing but good things to say about it (mods and custom songs also work on Linux too!).
- I've been spending more time casually working on improving my diet and researching longevity drugs and other supplements. The best summary of some of the (mostly boring, but a few exciting) things that I take I wrote up on https://nearcyan.com/supplements. Having quantified metrics for my own health really increases my motivation to improve things, and there's nothing better you can enjoy than improving your own health.
- I've also been into cooking a bit more (seems like there's a bit of a theme to these points hmm). It was interesting when I realized that not only could I learn to (often trivially!) replicate any of my favorite dishes from almost any restaurant, but I could also easily improve them with respect to my own tastes, and sometimes my own health (for example, replacing sugar with allulose, which is wonderful if you haven't heard of it - tastes very similar, almost zero calories, and doesn't increase (or even decreases!) blood sugar.
This thread feels pretty laid back, I enjoy reading what people here choose to do with their own leisure time, especially when their motive isn't profit (which although is nice, it's almost too common of a theme on HN sometimes).