Good point. I tend to operate under a certain level of self imposed stress plus whatever actual stress there is with the job. Not monstrous breakdown type stress, but definitely a heightened sense of urgency most of the time. Personally, my self imposed stress comes from my desire to make things perfect and my fear of failure regardless of the job at hand. I attributed most of my personal stress to nurture, and the lack of a family to fall back on should I fail.