Believe it or not but I am friends with two guys who recorded with MJ on all his recordings. I have met several times a drummer and a bass player - very famous session musicians in L.A. - who toured on the Thriller and Bad tours.... and I have heard a few stories about MJ !
One thing they all agreed upon is to say that the man is a pop music genius.... and the four above mentioned guys have played/recorded/toured with Lionel Richie, Barbra Streisand, Queen Latifah, Ray Charles, Steely Dan, Steve Winwood, Whitney Houston, Anita Baker, Al Jarreau, George Benson, The Crusaders, Chaka Khan, Celine Dion and many many others...
It seems that MJ lives in his own world... he's very "present" and mature when he deals with his music in the studio... but goes back to a "baby mood" once he's back into reality... I would not trade my life for his, not even for a million pounds.