I used to work 5 days a week, 9 am to 2pm. I quite liked it, but my employer would often call or ask for "urgent" stuff to be down after my hours, which meant I could not be fully present for family or whatever I had planned. I have now switched to a 3 days workweek at another job, and I find it much easier to set effective boundaries. If I'm not there I'm not there and that's it. I don't think I could ever go back to working 40 hour weeks to be honest. When do you get anything personal done?