Stress
Those working in naval architecture can expect to have a fairly consistent nine-to-five type of setup, meaning not working too many long nights. It's sort of like the blissful rhythm of calms seas. After all, there aren't too many instances of factories calling up shipwrights at 2:00AM, shouting, "Phyllis, get down here quick. If you don't design a tugboat in the next sixty-two minutes, the world is doomed."
Your work will be precise and contained, allowing you to leave your shipwrighting at the office when you're ready to go home. That's not to say it's stress-free, of course, because every office job has its stresses and this is no exception. Just be glad that your stresses are more likely the forgetting of a co-worker's birthday than, say, the problem of OMG the heart transplant failed.