I say death, because of the melodic death movement. Pure death metal generally annoys me(except for the super-technical stuff like Suffocation, Cryptopsy, Origin, Nile, etc...).
Black metal has some good stuff, though, from Dimmu Borgir, Emperor, And Oceans, Immortal, Darkthrone, Ulver, Satyricon, Melechesh, old Arcturus, to like Mayhem and Burzum and like, Celtic Frost and Venom and Mercyful Fate. But I'm only really a fan of a few of the bands.