Started playing Touhou at the end of middle school, and carried it over to high school as a means to kill time during downtime between projects. That, along with Dwarf Fortress. Ended up getting immersed in the universe and the massive fandom around it.
I easily get obsessed with new shows, games, animes and comics, but Touhou has always been a consistent source of joy for me. The fandom in particular gives me life with all the crazy amounts of content they produce.