I'm interested in what you guys have to say about this topic.<p>A recent post on HN, "A good day's work" (<a href="http://37signals.com/svn/posts/3180-a-good-days-work" rel="nofollow">http://37signals.com/svn/posts/3180-a-good-days-work</a>), reminded me of this issue, specifically the problem of not being able to mentally disengage from work if you have a certain type of job.<p>Do you know of any studies as to the level of happiness of people with "jobs with memory" (long term projects) vs "jobs with no memory" (e.g. waiters, cashiers, ER doctors)?