OK, Louie, it's official, you're in the will...
The simple answer is: Asperger's Syndrome.
I have been painter, draughtsman and sculptor since I got outta the crib (according to my Mother, I was quite the Abstract Expressionist, while still in the crib).
When I discovered computer graphics, I started drawing everything I wanted to have with MacPaint. When I discovered there were other people out there like myself who found vintage appliances interesting, it took off. I found this site doing nostalgia and "grief" research for drawings of washing machines and dishwashers that we had owned through the years. I needed to see pictures of them to correct and fill in gaps of the images I was doing strictly from memory. I did most of the drawings that you've seen with a wonderful, now-extinct, program called Freehand Graphics. When I switched computers recently, the new system couldn't run that program(probably intentional on the part of Adobe). Now I do the drawings with Adobe Illustrator because it was able to translate the old documents into its format, which is very powerful and I'm still learning how to control.