|Accordion = brutality|
It's also the only metal genre to consistently have solos on instruments other than a guitar. It's a nice change of pace to hear an electric violin (Turisas) or flute (Eluveitie) break up the song.
Every single folk metal band comes from Europe (don't correct me, this might as well be true), with at least 99% calling Finland their home. Yet another reason why the North American metal scene is lacking. By Metal-Archvies' count, there are 2869 bands from Finland. Those Finns sure know how to party. I bet there's a folk metal band playing at every street corner instead of a saxophonist.
I'll end with one of my favourite folk metal songs, Inis Mona by Eluveitie. Stay folky.