Rock Climbing
Reading a route is the same loop as reading a stack trace, except here falling is part of the process.
Music
Everything I have ever shipped had something playing in the background. The playlist is load-bearing.
Video Games
Half for the escapism, half because a well-tuned game loop is just good systems design with better art.
Magic: The Gathering
Deckbuilding is constraint optimization under uncertainty. I refuse to hear otherwise.
Nature
The one environment that has never thrown a dependency error or asked me to update anything.
Cooking
Same discipline as engineering: read the spec carefully, then deliberately ignore exactly one line of it.
Building Things
3D prints, PCBs, enclosures. Software that cannot fall off a workbench is honestly a little too easy.