My friends laugh at me for listening to?

Clical music. And for those who don't know what that is, its is the Symphony and Orchestra. I listen to Beethoven and Mozart mostly. Sometimes I'll listen to Bach or Vivaldi. But really I listen to everything! Literally! I listen to Metal, Rap, Pop, Country, Jazz, Blues (And yes there is a difference between Jazz and the Blues). I have also listen to yodeling, and polka (I'll admit Polka is kinda annoying). If something sounds good I'll listen to it. But my "friends" laugh at me for listening to these things and say that my taste in music sucks. I'm 18 and I'd say I'm pretty mature for my age, not just by the music I like, but by the way I act. How can I embarr them for not knowing so much about music?