Roger WatersTo some, he is the face behind classic Pink Floyd. To others, he is the temperament behind some of the greatest albums of the rock era. And to others still, he is one of the most original songwriters of a generation that overflows with notable talent. To all, he is an enigma: a rock star who not only eschewed stardom but also spent much of his career railing against it. But to call Roger Waters a mass of contradictions is simply taking the easy way