For all the trials and tribulations of the working week (waking up early, ironing, remembering your lunch, not being able to organise all the stuff you need to do to keep your life functioning), having your weekend to do exactly as you please with is a good trade. Sure, it's never long enough, but hey, you have money to do fun things with. Or not. You also have time to do...oh... I don't know... nothing in. Or everything. Or a happy medium. Or you can fritter away as much of both time and money as you like. Who cares? Noone. As JC says, as long as you're back at your desk on Monday, no harm done.
I have to say, although I have always been pretty strict about keeping my weekends free of academic work, now that I am working a regular job, I have found a new depth of appreciation for my time off. I am, indeed, more relaxed. I get all those itty bitty annoying housework jobs done. And I stop to dance around the lounge room like an idiot whenever I feel moved to. I go out until 5 am if I want. I stay in bed reading if I want. I watch crappy TV and movies when it rains. I spend time thinking about what delicious and nutritious meals I will whip up. I have time to try things on when I go to the shops. I plan fun things to do with family and friends.
Most importantly though, I don't think about work. I don't get paid enough for that. Nor do I have any pressure to beg to keep my job by publishing and grant writing and the like. I also don't have to worry about what will happen when my contract runs out. Or whether I am doing enough to keep my job.
I love the weekends!