Stress

 
Almost as nice as the view inside the car factory you spent the past month working in. (Source)

The job satisfaction rate for millwrights is really high (source). This is the type of job that only attracts a certain type of person, so it's rare to find someone in the field who doesn't want to be there. When everybody around you loves their job, it's like a big ol' party—if parties had lots of power tools and uber-responsible safety standards.

You see a mechanical problem, you fix it. End of story. No annoying office small talk about Mondays, no email chains, no report deadlines—just you and your tools, fixing a machine. It's almost like a beach vacation.