I reckon ASPERGERS? Jeffrey Lee Pierce was a musical genius who despite having influenced many later, more materially 'successful' bands [inc. friend Nice Cave, & Kurt/Nirvana via Pixies < Francis was a Gun Club fan] is often overlooked by those who don't seek outside 'mainstream'. Even after 45yrs hearing many wonderful talented singers, JLP remains my ultimate No1, check out 'Miami'. Or any of his work really. I find Intro/extra doesn't work; people are a mix, I could never fit those tests, but I now believe Asperger's does fit many - Cobain, Love, Dusty Springfield, Yorke, Stipe, Marilyn Monroe, CS Lewis, Marie Curie, etc - Obviously not all ASD are famous genius, but I strongly suspect most famous genius are ASD! The strange, awkward & life-enhancing types, at odds with & mocked by NT world yet who illuminate that world for ALL of us. *Many use drink, drugs to feel at ease with, buffer against an alien environment, which does confuse type definition.