Stress
Job satisfaction in the robot business is high (source), despite hours that can surpass full-time and work that can sort of consume you.
The thing is, workers in this field are specialized, highly-trained, and constantly working on the hot new thing. These STEM nerds love that sort of stuff, and loving your job is a huge contributor to a low-stress environment. If you're a STEM fan too—someone who enjoys Science, Technology, Engineering and Mathematics—then you'll love this job. It's like playing with Legos, just times a million.
Other factors detracting from the likelihood of stress in robotics include solid upper-middle-class wages with benefits, cool employers doing sweet tech-y magic stuff, and co-workers who love robots as much as you do. Well, almost as much as you do.
There's no reason a person with this job can't also have a happy life outside of work, including a family, pets, or side gig as bassist for a video game music cover band. So relax, take a deep breath, and keep playing with your tools.