When I started publishing d20 stuff I needed a name, so I picked Fifth Element Games because....well, you got me. No idea. I think I was researching alchemy at the time, and I liked the sound of it. The fifth element is aether, of course, if you haven't checked my status.
So when I started posting on RPG messageboards I figured the username would be a cheap and easy way to pimp my crap. So there you go.
It doesn't have anything to do with the Bruce Willis film, although I do enjoy that flick immensely.