I think more than writers the major influences on me have been European movies jazz and Abstract Expressionism.
Abstract Expressionism - the first American movement to have a worldwide influence - was remarkably short-lived: It heated up after World War II and was all but done for by 1960 (although visit any art school today and you'll find a would-be Willem de Kooning).
What students lack in school is an intellectual relationship or conversation with the teacher.