I started in programming in 1982, using FORTRAN on a Pr1me. I've since used a wide variety of systems, and my forte is the Pick/MultiValue database system (a NoSQL database).
My first linux system was Universe Linux, with kernel 1.3, and I now mainly use Gentoo, with SuSE and Slack as backups. (I don't like Debian-based distros, Gnome, or Red Hat.)
I much prefer digging into and optimising the internals of systems, rather than messing about at the user interface level.