For employees, the fundamental realization is that an employer who asks for more than eight hours a day or 40 hours a week is stealing something vital and precious from you. Every extra hour at work is going to cost you, big time, in some other critical area of your life. How will you make up the lost time?
— Salon Bring Back the 40 Hour Work Week by Salon
I'm a firm believer that all work should be done within a specified 8 hours during the day. No more. I've been in development teams where overtime was only used in extreme circumstances and even then there was no stigma attached to doing it because everyone else is. I'd like to think that if I ever owned a company or ran a team, I would adhere to the rule of limiting work to 40 hours a week, possibly less. However, I've never been in that position so who can say.