Yes MK is a private person, but we can still infer interesting points from what we see.
I think MK is a very human person in the sense that he can be contradictory depending on circumstances, which fascinates me. He has a light side and a bright side. Examples:
-He said in 1980 (BBC arena documentary) in response to the question "To which extent DS is just an extension of you, MK ?":"To no extent. It is all about the band". We all know that this was not the case and that going solo was more honest - in both cases the band is a vehicle to play MK'songs.
- He renounced stardom by ending DS, but can act like a diva with the infamous sausages story, in which he was ready to fire somebody for almost nothing.
-He can sustain very long relationships, but was able to fire his long term friend Ed Bicknel over a disagreement (the infamous Helmet story).
-He could care for his brother even after he left DS (je helped on his first solo album), yet over the years they did not reconcile, and it seems Mark did not care to fix the royalties issues.
-He says he likes it when people record his concerts, but in 2008 we go the infamous "finger of death" attitude.
-He generally shows love and respect for fans but not always (I remember some rude comments on a fan at the very end of the 2013 tour)
-Last but not least, MFN was to mock MTV and was the most successful hit on MTV
-etc...
I find this "Darth Vader" trend (has been to the dark side, but there's still good in him) fascinating