Music breeds duality. We enjoy the music we love-listening to it, talking about it, reading about it. But it's just as fun to passionately revel in mocking the music we hate. Fortunately, musicians make this two-lane path very easy to follow. Half the time they're creating timeless works of art that speak to the soul; the other half, they're recording ridiculous concept albums about robots. I Love Rock 'n' Roll (Except When I Hate It)...