For me, it was mainly the excellent game library plus a group of friends in the neighborhood who had them so we could swap games and copy them. I did very little programming on it, but did wind up as a reviewer for some small game publisher for while (no idea how I managed this) and, later on, my dad’s business partner gave us a 128 with a modem and I did the BBS thing for a while which was really fascinating at 12 or so.