8-22 yo-electrician (step-dad was electrician, owned his company-read:free labor, lunch and education, 18-22 for 3 other outfits as I moved around)
22-27 owned my own elecric/home automation company.
28 added building.
30 added developing, dropped electrical.
32 private money bought me out-offered me on as consultant to their (2 partners) company (software for AEC) and to run develop/build for them (read: I manage their fun money for developments and building).
4 more years will be 30 years in the workforce, and still under 40yo. Life's been fun. Not a thing I'd change...other than my hairline...