I went through several over different sites before i got to this one, was originally the name of my WoW character when i changed servers.
The only username i've never thought "wow yeah that's a bit shitty".
I've also found that i've never had a problem being able to get this username anywhere. The only problem i've found is for some reason is that everyone non UK European on WoW can't seem to read, and called me "Cinders".
I started as retro-lover when i first started foruming, on some retro gamer magazine forums and the old official nintendo forums (good lord).
Then i got fed up of it and changed it to AshMat which was just first name/last name. I was asshu on a couple of places for some reason, i think that's only my xfire and steam logon names now.
And then when AshMat got shit (especially as a wow character name), i moved wow servers and needed a name change, so i translated "Ash" into different languages, Cindres is what it spat out in Spanish.