I need to get my tag changed, HDKillerGun seemed good at the time but now it just seems Bleh, and its annoying to keep hearing "HD? As in High-Definition?"
If you can actually have the last name in the list, go for it. But their is a thing about Xbox Live names, If you have given thought and you think its cool, it wont be availible. I tried a user name I've used since I was a kid, DarthValoris, Taken, DarthValeos, Taken, Commander-HD, Taken, HDKiller, Taken, HDKillerGunn (Gunn was the name of my street), Taken, HDKillerGun, remarkably not taken.
GL, lol, hopefully Ill get my name changed soon, to Dr3adn0ught if its not taken hopefully....but I bet it will be