My current working theory on that is we always want what we don't have. For people who value their free time, rarely working over 40hrs a week is a dream. Whe

My current working theory on that is we always want what we don't have. For people who value their free time, rarely working over 40hrs a week is a dream. When they achieve that dream, suddenly they realize they want to be working less than that, and 40hrs becomes a drain and no longer the energizing freedom it may have been initially. Just a theory. Personally, I get bored with my current "life" from a given point in time, and need to radically change an aspect of it to add that excitement and focus back to it. Doesn't always go as planned though. But as you get older, I find people in general get tired of the same bullshit that keeps popping up at job after job, and that almost never goes away.