I think the longest I've had a job was a couple of years. I have quit either to move to another city, a change in law school schedule, etc. The shortest I had was 3 days and then I got fired. This happened just about a month ago and was due to severe depression and feeling overwhelmed (and telling my trainer continually how overwhelmed I was feeling. I think it was too stressful on HER for having to hear me continue to say how overwhelmed I was feeling.)