I enjoy writing text-generation bots that make up word forms or phrases following rules that seem ordinary at first glance, but turn out to be ridiculous when you take a closer look. Some of my favourite ones are @Deutsch_Falsch and @bot_in_world. You can find an extensive list of my best bots on my personal website.
I'm also fond of oulipo.social, a Mastodon instantiation on which you can't say anything containing an "e".
My favourite thing to do that has almost nothing to do with linguistics is bouldering (rope-free gym climbing).
Since I haven't been able to do any bouldering in over half a year, I've decided to model my favorite climbing gym in a 3d modeling software, for no particular reason other than being sad about not climbing.
I recently participated in a performance that involved printing a community blog on everyday technology use on tractor-feed paper and reading it out loud for three days straight at the re:publica conference in Berlin (2019).