Stress
You won't need extensive psychotherapy, but you might start biting your nails. Expect to feel a little frazzled at times. You have a long to-do list, with a lot of people to take care of and chores to cross off. Direct these people here, escort the jury here, tell the jury to do this and not that, escort the defendant there, tell the whispering couple in the back row to can it. And so on.
If you're working overtime, you'll risk spreading yourself a little thin. But in general, there's a reason so many should-be retirees cling tight to this job for as long as they can. Unless something goes really wrong, it's pretty easy on the mind and body.