I feel like a loser compared to some of these other commenters lol. I sometimes like to play retro games on my handheld emulator. Those usually get boring pretty fast. I like to watch YouTube videos about really old computers & try to figure out how they work. Like vacuum tubes and stuff - really simple computers. I also watch videos on repairing old electronics and computers too. But I can’t really justify any investment into that hobby so I just live vicariously through the videos. That’s about it.
And any chance I get I like to disconnect from society completely and go backpacking in the woods either by myself or with a couple really close friends! But that could never happen often enough.