I have a full-time job with salary and benefits. I work 3 12-hour days per week. The job is stressful and I have bosses monitoring every little action.
I have the opportunity to work overtime at this job on my off-days and get paid "x" amount of dollars per hour. Instead though, I choose to drive an Uber for "half x" dollars. It allows me to set my own hours, be my own boss, and have considerably less stress. I value these things more than the extra money that would be brought in from the overtime at my main job.
How can I best phrase how I get more life value out of the freedom and reduced stress than I would from twice the money? My first inclination is that it's something opposite "opportunity cost," but my brain seems to be stuck at this point to come up with better terminology.