Michael;
Seems like the most talented people always have their vices and demons. Writers, artists, craftsmen etc. Never have claimed to be any of the above, but Lord knows I have plenty of my own.
Everyone I have ever known who was a master at what they did, had one or most of the qualities you mention..... Being opinionated, a weakness for women and pulling a cork, etc. etc.
I say this with no disrespect, as these were people whom I respected and even idolized (many I still do). Always figured that guys who can maintain that level of concentration and dicipline need to "let the badger loose" more often than most....
I for one would love to read about what these legends were really like, and I bet they would all laugh like hell it you were to write about it.
Respectfully;
Kraft