What’s the old adage about freelancers? They’re willing to work 80 hours a week so that they don’t have to work 40?
That said, be sure you’re not making the move back to corporate life with rose colored glasses on, because the landscape has changed drastically over the past ten years. You know those calls and emails you hate to get from clients with emergencies on a Saturday night? Nowadays your employer won’t hesitate to do the same thing, and it’ll reflect poorly on you if you don’t hop to.
If you’re in any kind of senior role today, your work week never ends.