For those who love Viking Metal, try out Moonsorrow.
It's awesome, though you'll probably not understand a word of what they're saying.
I'm into a lot of Folk Metal, not only viking, though. Arkona, Eluvitie, Corvus Corax (Though that kinda strains away from metal) and stuff like that. ALESTORM!!!!! \m/ Probably the most awesome band of the moment. Too bad they resist in coming to the country that created the Piracy at first.... ;___;
@Carnas: I see you have some powerful metal-fu! Genitorturers has awesome songs.
And Geni is the hawtest singer. *drools*
I actually listen to a lot of Heavy Metal too. I'm focused right now in Judas Priest, for instance.
Three other bands I wish to bring to the discussion: Massacration (Brasil), White Skull and One Man Army And the Undead Quartet.
These bands are SICK! Not the first one. That one is just fun. :P