Short answer: first touched a linux system over 15 years ago.
Long answer: I was a kid who would jump on my dad's work laptop which ran SuSE and play around with the operating system in middle school. I'm pretty sure the first time I booted in that I didn't even know there were other OS's besides Windows and Mac. I remember asking him a million questions about it and being fascinated that it was the driver of the huge supercomputers that he worked on. Had a lot of good times learning how to write simple Perl scripts with my dad back in those days.
Fast forward to 2008 and I was really getting into computers, programming, and starting my CS degree. I had just received a brand new laptop and absolutely hated Windows. My older brother helped me to setup and install Ubuntu on my computer and that was that. Haven't touched Windows outside of a VM since (well, not totally. still know a lot of people who run Windows). I stayed on Ubuntu for quite a while before I began distro hopping like crazy. I have run Debian, Kubuntu, Mint, Kali, Arch, Manjaro, Backbox, Fedora, openSUSE, Zorin, MX and many others that I'm forgetting through the years.
I'm happy to say that my days of distro hopping have been over since mid-2018. Right now, I have 3 machines that all run different flavors that work best for their use case:
My work/dev machine is running Pop_OS 19.10 (it's a system76 Oryx Pro), my "home machine" runs Solus (and it's by far my favorite to use!), and my old laptop has been condemned to a testing/tweaking machine that I play around with for fun running Gentoo (fairly successfully, actually!) for a little over 2 years.
It's been a crazy ride and I have always considered the larger linux community to be a bright spot in my life. I've been running Solus now for about a year and a half and love what I get from it. Some truly great engineering, design, and polish in this distro and I hope to enjoy it for many years to come!