I think stress, like pain, is subjective---it's what the person experiencing it says it is, at the time that it's happening.
A lot of people would think my job as a DON in an assisted living facility is very stressful, and every so often it does get that way. However, the majority of the time, having so much responsibility energizes and fulfills me, because I need to be creative and to exert a fair amount of control over my work environment. When I was a hospital staff nurse, I had ZERO control over my assignments and was treated like a pack mule, which was far more stressful for me than my current situation. Even though I could (at least in theory) leave it all behind me when I clocked out and exited the building, I'd rather take the job home with me every night and weekend---as I do now---than go back to being just another brick in somebody else's wall.
One of the best things about nursing is that there are so many choices within the profession itself; if one type of nursing doesn't suit you, you can try another. I've worked in several different specialties (including postpartum and ICU) and had different levels of responsibility, and this is by far the best fit for me. Who knows, in five years that could change.........and if it does, I'm sure there'll be something else out there for me, because I'm a NURSE!