I am a mostly retired programmer and tester. I've also been wiki enthusiast in various businesses where it was used as a means to collect tribal knowledge in lieu of formal process documentation and the like. I've been writing (simple) HTML since wikipedia:Lynx (web browser) was a cool new thing (same year I finished my MS).
I don't expect I'll author new pages here but I may make a tweak now and then, but besides making a modest donation, it seems to me that being part of the community is important in helping keep Wikipedia and the foundation alive ... and free.
At the moment as a hobby I am tinkering wikipedia:Raspberry Pis, one of which is running a Personal Weather Station and posting observations to the Web.