This 1000X ! I'm currently working on emulating the Apple 2+ speaker better. It's been a 2-3 spare time hours a week for about a year now :-)

But the joy of working on a machine that's part of your life, without the need to please end users (which is cool too but sometimes induce pressure), well, that's basically coding like when I was a kid. Except that now I have a TON more knowledge to work with !

And, while working on disk emulation I had the pleasure ot discover those many copy protections that "prevented" me to get many games :-)