Doillon blames his fringe status on his failing to graduate from high school. I think he means he was outside certain social circles by virtue of class and level of education. He is a kind of self-made director who is on the outside of France's mainstream film industry. Most of his films have only had limited distribution in France and they seldom feature actors of significant fame (his latest appears to be an exception). From my readings: there is a consensus that his main theme is familial discord, from a youth's perspective. I don't know his work to be able to comment. I have only seen Petit Freres, ponette, and Raja (and maybe The 15 year-old Girl, but not sure). I definitely want to see more.