My current working theory on that is we always want what we don&#x27;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.<p>Just a theory.<p>Personally, I get bored with my current &quot;life&quot; 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&#x27;t always go as planned though.<p>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.