After doing this and that, nothing for more than a couple years at a stretch, I decided relatively late in life (age 34) to go back to school for 2 years of premed studies, then med school, residency, and a postdoctoral fellowship in Clinical Immunology. I was in private practice for about 12 years before deciding that I really didn't like the various and increasing pressures of medicine. I sold my practice and just relaxed for awhile before working for another 3 years as a consultant for an online medical decision-making tool for patients and doctors. Five years ago I finally retired for good. Now I just hang out, take classes for fun, and do some volunteer work.
John