I feel like we've all made one at some point.
#1
I made many universes of my own so I’ll describe the top 3 ones.
1) During quarantine, my brother and I made up a universe in which there’s a planet with many different countries but the main ones are Funland, Goldhome and Masti Lare. I’m the queen of Funland where all our stuffed animals live. There’s a genetic mutation in part of the population that turns them into superheroes but the main ones are a group of 4 who call themselves “the Annawins”.
2) There’s a parallel universe in which I managed to take over the world and the galaxy and that version of me is travelling to other parallel universes to “liberate” all the other versions of me.
3) I don’t have much details for this one which I call the “Ace Universe” where my comics are set.
2points
#2
1. I needed something to do over quarantine, so I thought, "what if a global pandemic is just the beginning?" I created this whole story about if Earth was visited by aliens, but their technology fused human DNA with theirs, creating superhumans, but only a couple dozen on a single continent. Earth was adjusting to this new society, all the while dealing with Covid.
2. This is a technologically developed fantasy world, complete with elves and ogres and all those fun humanoid races, and every race (even humans) use magic differently. Because technology relies so heavily on magic, each race developed different technology systems. My main cast are not the most lawful people, and MC is a half-elf, so the magic from his human side gets him into human systems, and since the elven side of his magic isn't compatible with the system, he can tear apart whatever he feels like before anyone realizes what going on.
1point