The story behind mine is a bit silly, but it's still a story me and my friend hold dear. I was 15 years old at the time, and I was hanging out at the place where all my oldest friends usually reunited everyday for about 11 years by now. It was basically our niche.
Anyway, it was 2AM and only I and one of the two guys who we're living there was still awake. We we're playing Saints Row 1 on the XBox and smoking extremely unreasonable amounts of cannabis, and we decided to make a character called "The Ganjaman" and make it as perfect as possible (Which was an almost-exact replica of Dennis Brown, a Reggae singer)
We spent around 2 or 3 hours (Can't quite remember) to find the perfect physical appearance, clothes and car for him, we really put a lot of thought and time into it basically.
When we we're almost done, we entered the safehouse to go make some final changes to his clothes, but as we changed the clothes, the game froze. We stood there for 5 minutes, hoping for it to unfreeze at some point, but it didn't. As we stood there, we realized that we never saved the game once since we started. The Ganjaman was then forever lost.
In memory of this character, I took his name a week later as my permanent online alias to give tribute to this lost memory, and reversed the word a few hours later to give it a more unique twist and to confuse people in-game.