Never cared for his music...I really don't "get" his singing.

Still, it was sad to watch him degenerate over the years. Obviously he had an f'd up childhood but he went from a pretty normal-seeming musician to a complete circus act. That said, it's a huge shock to me. If he had big health issues (which I guess by definition he must have) I never heard about it. 50 is way to too young to go.
RIP, Jacko. You were definitely an icon to millions, if not billions, all around the world.