I also love reading everyone’s games memories.
I first saw Doom on a 486 laptop my dad brought home for his job, it was the shareware version, and of course I had to make a copy. I remember being scared to death of Pinkies (the large pink demons in E1M3), I thought they were the most intimidating beasts I have ever laid my eyes on. This was around 1995.
We didn’t have internet at home or school (this was during the dial-up age), and thus wasn’t aware of the thriving Doom community nor the existence of custom maps and tools to create your own. I would have loved that!
Years passed until I rediscovered the game ten years ago in 2016. The game has been a constant companion in my life since then.