If you find something you love doing and can do it in the way you want, 80 hours isn't bad at all if you're otherwise unencumbered. I did a 7 month stretch whe

If you find something you love doing and can do it in the way you want, 80 hours isn't bad at all if you're otherwise unencumbered. I did a 7 month stretch where I was working from home, on my own schedule, doing what I loved, and was doing 15-18 hour days 6 days a week (~90-100/week), while still managing to have/cook dinner and a bit of downtime with my now-wife each day, plus a full day off. It was fantastic. Once the product was live the work shifted just so slightly from pure create/build to maintenance/improvements, going into the office a couple of days a week, and suddenly even 60 hours felt like a lot, and eventually it was just a job and I was doing 40-45. I think it's more a matter of finding the right thing and schedule for you rather than imposing some kind of convention onto it.