Thanks jbaent for all these detais. May I ask how you know about them ?
Your conclusion is a bit black & white, isn't ? Life tought me that people tend to be grey instead of all white or all black...

Maybe one of the reasons I am fascinated by MK is precisely his human complexity. What kind of man really is he ?
The rock star in the stadiums, or the intimate artist who renounced the dark side of the force ?
The humble, self-effacing man who never talks about himself, or the tyran/diva who only wants "yes men", gets enraged about saussages, or fire his long-time best friend on the spot ?
The open, tolerant man who was against the Napter lawsuit, or the "finger or death" ?
I guess he is all of that. One foot in the light side, one foot in the dark side. At least, somebody who left the dark side on his own initiative

What strikes me is his relationship with his brother: I understand their quarell in 1980, Mark was the most talented, but David wanted his songs to see the light and not live in his brother'shadow.... but then, in 1983, Mark plays on David's debut album, so the 2 brothers seemed reconciled, yet, over the years they never got close again. How could this be ?? is it because of the overcommercialisation of DS starting 1985 ? Yet, Mark's solo career is much closer to David's intimate music crafting, why this turn did not get them to get closer ? If Roger Waters and David Gilmour, who had been "trowing their toys at each other for 20 years" as RW said, could reconcile, why cant' 2 brothers of an otherwise united family can't reconcile 30 years later ??