Some of my favourite bands/artists are:

Black Sabbath, Venom, Mercyful Fate, Candlemass, Arch Enemy, Bathory, Destruction, Astarte, Judas Priest, Warlock, Iron Maiden, Motörhead, Celtic Frost, In Flames, Holy Moses, Finntroll, Dracena, Girlschool, Isengard, Opera IX, Windir, Rammstein, Nightwish, Nazareth.