Working for yourself versus working for "The Man" makes a huge difference because you know every second of that 60 hour week you're putting in is to your direct benefit.
Talk to someone who owns their own business working 60 hours and then someone who's being forced to work 60 hours for their company and you'll be talking to two people with vastly different outlooks.
Yeah, my experience is the opposite. Sounds like you hang out with people in a higher tax bracket than I do, and that could explain some of the difference in experience.
Reminds of a bit by Chris Rock. Paraphrasing: "If you have a job, the clock is your enemy and you can't wait for the shift to end. If you have a career, there are not enough hours in the day." In his world, having a career means working 100% for yourself.