Most of those are fairly unique to TO. But like xX______Xx isn't, and _____BR, or the traditional, [narutolingo]12945884881828488582881, aren't.
People just like to imitate popular names. For me, I TRY to be original. I use words, like Audacious, past experiances, TzuNammi (Was a game my family played at one point. We turned words into names. Tsumani -> Sue Name, and then I malalized it, Sue Name -> Tzu Nammi.), or anime/manga characters I LOVE. (Momiji, duh. =-=)