Job search advice for possible PhD dropout I am considering dropping out of my PhD program, which I am halfway through (pre-proposal), and am applying to full-time jobs. My plan is to go on a leave-of-absence for a year, and afterwards either return and finish my PhD, or quit my program permanently. Even if I finish my PhD, I plan to leave academia, most likely for finance. I'm applying primarily to quantitative analyst positions to give myself a better idea of whether I want this as a long-term career. And, if I get a job and still enjoy it after a year, I plan to formalize my PhD dropout status.

I have a solid publication record in a very relevant area, so my research skill is an important part of how I'm selling myself. But I don't know how to discuss my current situation in my cover letters and interviews. The honest answer is a combination of burnout, personal/family circumstances, and cynicism over my research. But is saying this unprofessional? Also, should I leave out all discussion of my situation in my cover letters, and just wait for interviewers bring it up?
Way too many personal details may look unprofessional. You might try something like


  I was not satisfied with my progress in academia, and I do not want to lose any
  more time by trying. I believe I can fully utilize my productivity and develop myself better in the industry, by the help of financial means.


This is both honest, motivational, and looks less pretextish. 
Not everyone will care about what you lived in your personal life.