Well my name isn't anything special.
I was about 14-15 years old, and I had used some really bland usernames until that point, so I started brainstorming for something better and original.
As always, I could've just taken some word, a Japanese thingy, just something obscure or some crazy abbreviations, but I've always had a bad habit of being a smart-ass and original to some extent. Thus I delved into the linguistic side of things.
Basically, I conjoined an suffix -tic, -otic(meaning an obsession of sorts like in manic, for example with the word "arcade", to make a fancier way of saying "game addict".
Boy, was I proud of it then, and still kind of am still, after over 2 years of using it.