People who identify with a certain musical style oftne have a certain hairstyle.

long greasy=metal
bald=metal, or gabberhouse, or some other niche genre (usually)
middle long clean=rock
middle long greasy=grunge

etc....


Not always true, and might depend on the area, but hairstyle syays a lot about your musical taste if you're still in your teens. At least it did so when I was young(er).