Lately it's been Session: Skate Sim, with "hardcore" difficulty settings. I'm pretty terrible, but finally landing something reasonably dope is so satisfying, and just skating around the city is quite relaxing.
Otherwise my go-to is whatever GTA game I've got installed, and just driving around, listening to music, and watching the goofy stuff NPCs do.
I also do love me a good open-world survival craftathon, with a nice, exceedingly outrageous recipe family tree. Hunting down whatever resources I need to craft whatever thing I need in order to be able to craft whatever cool new thing, so that I can unlock more crafting recipes to start the cycle all over again, it's all so cathartic and easy to get lost in.