My first at home computer was the Commodore VIC-20.

There were many hours spent on that machine, popping cartridges in and out of the back slot (Radar Rat Race anyone?) and I learned how to program in basic on that machine as I needed a dice roller back then and saving to tape was so much fun.

It was the only non-PC machine I’ve ever owned, unless you want to count the 3GS that I carry now which has way more power than that first system.