Started with Red Hat in the kernel 2.0 or 2.2 days, because I picked up a book+install CD at a garage sale.

Slackware on an old laptop got me through undergrad (desktop ran Gentoo, but I didn’t use it much).

Switched to Debian after that, with a little Arch in grad school btw (not a huge fan — to each their own).

Running Debian now (desktop, laptop, and SBCs), but my heart belongs to Slackware.