Origin of your username? Would you change your name if you could?

[kasillas88]

My last name is Casillas, I just switched C with a K and added my birth year. I wouldn't change it because I have the same username on other websites. My first online name was for SOCOM II and was TW-YOUNGGUN. I used that name for all Ps2 online games and a few websites until I decided to leave the clan 'Tactical Warfare'.