One of my most favorite bands is Krisiun from Brazil
Death Metal, Krisiun, Devourment, Deeds of Flesh, Decrebit Birth, Vader, Behemoth, Immolation, My Dying Bride, Cannibal Corpse, Rotten Sound,Disembowelment,Brodequin, Morbid Angel, Dark Funeral, Angel Corpse, Belphegor, Emperor, Gorguts, Abuse, Hate Eternal, and many, many more.
Sci-fi and stuff like that
John Petrucci,Derek Roddy, me and Terminator