I used to work in acute (inpatient) dialysis, and I remember when I was full time with my then-company, I felt that the hours were unmanageable. I worked 18+ hours a day(!) three days a week. All I did was work, sleep, do laundry, and work again. Rapidly burnt out. Then I went part-time, which meant two days a week, 12-13 hours a day. I noticed that I was so much happier, because I felt like I had a life again. Sure, I made less money, but work stopped feeling like a prison sentence.
I work in inpatient psych now, and have been full-time for almost a year. One of the things I hate the most about my current job is that it's on a rotation system, so you're really off work for 2-3 days and then back on for 2-3 days of work. So I never really feel that I'm mentally off work because I'm spending a solid chunk of my time off resting and recovering (I work night shift as well). I'm going part time in a couple of weeks (so it'll be just 4 shifts in a two-week period versus 7 shifts in a two-week period). Very much optimistic that I'll feel less grouchy and drained from work with this one too.
Anyway, my question is, if you've gone from full time to part time, have you also noticed any quality of life changes?