My brother inlaw & I had a computer hardware and service company in 89-91, because we love electronics and technology. It was an absolutely pain the ass that we have to deal with illiterate users. I ended up with a degree in IT after that, then found that the majority of the corporate people (specially people with MBA) are technologically illiterate and are unreasonable.
I hung up my IT hat after a few years of working in it because it was more enjoyable working with my hands (helped built my mom house over a summer). I turned my hobby of construction into a career (shipbuilding) that I have been in for a decade now and still enjoying it.
Conclusion:
Electronic hobby turned into owing a company, and then worked in IT (network security admin, and DBA).
Building house & toys out of wood, bamboo, mud, metal work, casting, plaster, and working on cars into a shipbuilding career.