Biomed might be a bit more ADHD for some, but it hits all the tropes.

I don't know what I'm going to repair day to day, I'll get all sorts of weird stuff. And sometimes get interrupted which irritates me when I'm in the middle of a big project.

But my time clock is regular daily. I go in, I triage what I can repair vs send out, what is needed immediately vs being put on the "When I get slow period" and figure out how to put in PMs. And what that really looks like is if there's no emergency repairs, I ask my self what am I feeling that day. Do I want boring and repetitive? Lets go PM some machines. Do I want a bit of thinking, lets repair something I've repaired dozens to hundreds of, the troubleshooting is the thinking time. Do I want something novel, time to dig up some manuals and find something I've never worked on before.