Choosing a new user name does require some thought on the user's part. But for the purpose of anew name, what you chose is ultimately your decision. You should find something that 'fits' your criteria of character or something that just caters to 'you'. In my case I chose X. It's simple and cool-sounding. I also chose it due to my favorite Capcom character; Mega Man X. That and like MMX, I too have an inner conflict of fighting and violence. It just fits is all. And I also use it as a pen name for my art. If you have a nick-name or something along those lines, why not go with it?