His voice; I don't think anyone can register that kind of uniqueness. You only get a few before you start hearing the same, per se. I mean that in a way that says--if you hear a voice that reminds you of someone else, it's not as unique. Michael's voice couldn't really remind you of anyone else's. Maybe a couple of influences here and there. But let's make one thing clear, it was his own and damn it, he sold it like a car salesman with a pitch.