Nothing crazy, just ditching an old (and these days largely irrelevant) handle. I hadn't used it anywhere else since 2003 at least; I left some forums around then and was already joining a handful of new ones, and went by Jazz or some variant of it (the MX5 part comes from the Mazda Miata I used to own, the European name for which is the MX-5). Even changed my Xbox Live gamertag before you actually could (pre-360 days), so I had to dump the old account and start a whole new one. The Jazz part is partly from the Autobot, who was one of my favorite G1 Transformers characters, and also a nod to the character Jessamyn "Jazzbeaux" Bonney in Jack Yeovil's awesome book Krokodil Tears.
I just never got around to changing the name here. Which I think makes this the oldest forum account I have that I still use!
(Plus, you know, Curtis still asks me what the hell my old handle means. Combination of the band name My Ruin, and the Tura Satana song Luna. Both dropped off my playlists years ago, hence the irrelevance.)