Ghost gym leader, which would be kind of ironic given how easily scared I am, but ghost types are so cool. And everyone loves horror/reaction content, so I could make a whole game and stream out of a haunted house.
I guess that means I'd have to have some responsibility over the town my gym is in, but I guess I can live with that.
The toilet leaking seems like a little too much effort for me, but otherwise I'm on board. Don't forget moving their small and easily misplaceable objects when they set them down. Maybe just around the room a little bit, like putting their phone on their seat when they get up instead of the arm of the chair where they left it.