Great interview with Billy Joel at the NYTimes:
Everybody is different. Some writers can write reams of great books and then J. D. Salinger wrote just a few. Beethoven wrote nine symphonies. They were all phenomenal. Mozart wrote some 40 symphonies, and they were all phenomenal. That doesn’t mean Beethoven was a lesser writer, it’s just some guys are capable of more productivity, some guys take more time. Mozart pisses me off because he’s like a naturally gifted athlete, you listen to Mozart and you go: “Of course. It all came easy to him.” Beethoven you hear the struggle in it. Look at his manuscripts, and there’s reams of scratched-out music that he hated. He stops and he starts. I love that about Beethoven, his humanity shows in his music. Mozart was almost inhuman, unhuman.