I mostly enjoy the act of programming, without the need of producing something useful or profitable in the end. Particularly when it's a hobby project in whatev

I mostly enjoy the act of programming, without the need of producing something useful or profitable in the end. Particularly when it's a hobby project in whatever domain interests me at the moment, e.g. currently it's low-level optimization hacks and ridiculous concurrency in Rust. I'm a developer proffesionally but find I only spend about half my time writing code, so I still have plenty of energy for my own projects at home.