I've not got the academic chops of you("Gina"), but I've got my ideas on big Danny.
But more likely is a learned personality disorder. And also it's very likely that he was born a "Blue Baby" or the OB-GYN damaged Dan's frontal brain lobes with the forceps.
Dan made a leap of faith and proclaimed "I'm am artist" at an early age. His family allowed him to get away with it. Damn great story of nurturing and documentation of him. But if Dan hadn't "Made It" he'd have just as soon murdered them all, sad to say.
Sure there's talent and I respect it, but in effect Dan decided he was "Special" and too good to work, and he got lucky and got away with it.
He was eccentric, sure. But the time (6 months) with the caravan and the drugs
left their effect most probably. Danny wouldn't have been the first kid to fry on an initial try at acid or 'shrooms, hey?
I say this because I mirror Dan in a way in my life and inability to conform.
I didn't hear of Dan until April of this year, btw.
I shun people and isolate myself, and have huge bitterness at women.
I believe I'm too good to work.
I say I'm a writer, even though I've only sold one piece that was published in Oct of 2004 to Time/Life Inc. for Sports Illustrated.
I live with my widow mother and have no intentions of leaving until one of my novels sells big and I've got major $buck$ to hire whores to come to a place of my own.
My neighbors pay me to do yard work, but I put it off because I'm writing, and boast to them of that (Translation: Leave me the **** alone unless you want to throw your body at me neighbor lady... I'm an "Artist" here. Screw your lawn, I'll get to it when I want, lol.).
All that being said, I adore the guy. He was very fortunate in how the Austin, TX music scene embraced him. His time spent "Networking" at the McDonalds while working there is sheer genius, and a feat that will probably never be successful again for another "Artist."