I found neocities through one of my friends showing me the Wired sound for wired people page back when they had an ARG going, although at the time I had no interest in making a website. (Then in turn thats how I found city pop and the song Tokio Town!)
Later, on my own, I found goblin-heart's (formerly sadgrl.online) site and decided to join neocities.

At first this website was going to be a wiki for a dnd campaign I was doing with way too many friends, but time went on and that campaign died. so I turned this page into my own personal website.
(In fact theres still a remnent of it here, although there isn't much there)

If you were on youtube around 2015-2016, you've probably heard of the game Undertale

Well if you were a little bit into the fandom as I was you've probably also heard of the hidden character Gaster.
I was watching a GameTheory video that talked about Gaster, and the filename for Gaster's sprite is called "spr_mysetryman", and thus became my name.

Although I've changed it to be a bit different, first was TheOnlyMysteryMan, and then it became 1moreMystery, and shortened to mystery.