[nickjj]

It really depends on the profession I think. Sometimes you're forced to work really long hours just based on your business.

For example a dentist might choose to work 3-4 days a week, but be open to seeing patients from 9am to 8pm to compensate for people unable to go during normal business hours due to their own work schedules.

Then again I think that business is a lot different than software development. Technically we could sit there and work on 1 thing for 12 hours, where as a dentist is hopping between patients and has a bunch of small breaks through out the day in between patients. It might not be "goof off time" breaks, but it's something that breaks up the day.