I work in retail management and have a crazy schedule that changes from week to week, so Mondays are no biggie. I take Monday off a lot, actually, which is nice, because I can go to a state park or lake or the library and have it pretty much to myself.
I worked a corporate job with "banker's hours" for years, and wasn't too thrilled with it. If I had business to attend to I had to take a personal day, and felt pretty much chained to the rat race.
I have a lot more flexibility now, can sleep in three or four days a week, and relish going hiking on a weekday and having the trail/mountain to myself, when most everyone else is stuck on the phone/computer in a cubicle a la "Office Space"...