According to a three year study published by a university in Edinburgh, heavy metal fans and lovers of classical music have more in common than they may like to think.
(Although fans of heavy metal bands like Metallica are traditionally portrayed as work-shy, long-haired students, and lovers of Mozart are seen as sober and hard-working, researchers found that both music types attract creative people who are at ease with themselves but can be introverted. I must say I've never seen anyone head banging to Mozart though.)