Sure. I'm a Certified Public Accountant - I received my BS/Acctg in 1983 and my MS/Acctg (in taxation, no less) in 1984. I practiced in tax for a year and hated it - I wound up working a temp job at a new HMO in 1985 and have been in healthcare ever since. Ten years ago I spent a couple of years managing a residents' clinic for a medical school. My supervisors (the attendings) noticed my interest in medicine and strongly encouraged me to consider medical school - they even let me attend resident lectures when time permitted (I also got to teach residents about healthcare billing, which was fun). I think the idea of giving-up my whole life to start over scared me too much back then - I went to work for a hospital where I'm an in-house consultant - whenever the hospital wants to build something or buy something, I research the project, run numbers, and write reports. My projects get me out with the clinical staff and it's a lot of fun.
I knew I wanted to be a doctor ten years ago, but I honestly wasn't sure a CPA could have the "right stuff." But I spent some time working in patient care as a non-skilled technician as part of a hospital volunteer program - and was hooked for good. I also looked after for my elderly parents (who had me late in life) and found that nothing was more rewarding. When my dad died almost three years ago, I realized that I could still do whatever I wanted to do with my life - but time was growing short.
So - I finished all my prereqs in night school in 16 months. My BCPM is a 4.00 with 65 hours (including some post-graduate computer science work I did) and my overall UG is a 3.93. MCAT was a 32R. I thought I was a great candidate, but apparently not everyone was happy to see me coming. The University of Oklahoma, however, admitted me this month with a freshman scholarship. I am so proud of OU - they gave me a level playing field to compete on, and I felt very welcome - and treated like anyone else. I've met my classmates on SDN and at the interview and they're great people. I can't wait to go to school there.
I'll finish residency at age 51. Oddly enough, my dad was 51 when he finished law school. He'd been an engineer for over 20 years when he decided on law - so he was one sharp patent attorney. I think he'd approve of what I'm doing.
You must have an interesting story, too. Thanks for letting me go off-topic to share.