I’ll start:

My first ever world got deleted because my laptop was old and full of viruses (early 2010s virus protection was really poor and watching free movies online and downloading stupid games caused this, I was a tween at the time so not super informed about internet safety lol) so my laptop had to get factory reset and everything got wiped.

I still vividly remember my creative world’s first base I built being made of birch logs and red stone torches (I didn’t know about regular torches lol) and the world would end up being where I learned the game and ended up building really cool things like a massive cruise ship, a bunch of neoclassical buildings and this crazy underground tunnel connected base that had redstone contraptions and water based transportation systems. I miss it so much and I try to remember builds that I made on it to recreate in my newer worlds but mind you the world got deleted 11+ years ago at this point.

The second world I lost was one I created with a newer laptop in my first year of university and I was building amazing things in the little spare time I had during the two semesters. I remember sketching the builds during class to then finish working on assignments and start building them. This world had so many amazing things, a bunch of mega builds, a brick factory town, a huge grand court, small villages throughout and even some temples.

I lost the world the following summer because of a stupid bitlocker glitch that was a result of a Microsoft update and everything on my laptop that wasn’t on my online drive was gone, they had to give me a new laptop because the thing bricked, it wouldn’t even set back to factory because of the encryption glitch being so bizarre, it really made the tech guys completely puzzled and apparently they even contacted Microsoft and they too couldn’t do anything.

Since then I backup my worlds and take a lot of screenshots of everything lol.