For 10 years programming has been my thing, but for a while now I have been getting the feeling that programming won't be big in 30 years. If all my eggs are in the programming basket and I can't keep a programming job in the future, I would be out of luck. (presumably because it's a blue collar profession by that point).

With that fear in mind, becoming a M.D. actually seems like it would be a good decision. Even this late in the process, doctors have been well paid and relatively rare for thousands of years; a tried and true profession. Plus it will sate my curiosity about the function of the human body.