How come? Or is it shareable? ;-)
I'd never used anything but my own name before, mostly because I'm not very creative and I didn't want to pick something that said something ONLY about that moment in my life - i.e. something related to a hobby I might not stick with, or a book I was currently infatuated with but that might not be so important to me.
Since I've been infatuated with LOTR (and Sam) since I was 12 or so, I figured this was safe...