I just combined the names of a bunch of characters I like for my PSN name. Those were Cloud Strife, Riku (Kingdom Hearts), and Mello (Death Note). Smash them together, and voila. I was in, like, middle school or early high school at the time and I kinda consider changing it, but it's what I'm used to so I leave it alone. At least I still like all those characters, too.
For everything since then, I pretty much use the same name as I have on here. It was combining Final Fantasy with Skies of Arcadia. I guess I just really like combining names.