Long before I was active in on-line forums or mmo's, I was checking my email and saw a banner ad for apple strudels... but it was tiny and had an odd font, so for a fleeting moment I read it as apple shrapnel. Thought it was an interesting, almost cute combination of words.
Few months later I get an Xbox 360 for my birthday, and I totally seize up when prompted for my gamertag... I blink a few times, stare blanky at the screen, then suddenly remember that ad I saw.
I assumed spaces in names wouldn't be allowed, so just used capitalization to keep things legible, and hence: AppleShrapnel
Since then, its become my default handle for forums and Steam. Pretty much always gets condensed to just "Apple", but I don't mind. :3