I suppose you could argue that I started in 1989 or so with the DOS game Phantasie that my friends had, but the first TTRPG I owned was Iron Crown's MERP. I couldn't make heads or tails of it, and so the first TTRPG I actually played was in my friend's Earthdawn game around 1993.
A year or so later I was introduced to D&D (technically, AD&D 2nd Edition), and it was love at first roll. I played a bunch of other games in the same time frame - World of Darkness mix, GURPS, Marvel Super Heroes, Toon, Castle Falkenstein, Og, and more - but my One True Love has always been D&D.
I played a bunch of 1e without even realizing there was supposed to be a difference, and I picked up the Rules Cyclopedia at some point and loved it even more, but it was mostly 2e until 3e came out, then 3e and 3.5.
I bailed on 4e pretty early (no gnome in the Player's Handbook? What is this garbage?), but returned to the fold during the Next playtest.
Now I publish 5e stuff and play a ton of Dungeon Crawl Classics. And before too long I'll be publishing for DCC too.