All kinds of. Started listening to Heavy Metal in early 80s, Accept, W.A.S.P. and Ozzy. Then came the Thrash & Power Metal era with Agent Steel, Flotsam & Jetsam, Helloween and some German Thrash Masters like Sodom, Destruction & Kreator. Sodom´s and Destruction´s early stuff are in fact Black Metal. Venom "invented" Black Metal with their early stuff, though their music was pretty much like Motörhead, jusr rawer and with satanic over-the-top lyrics and imagery. One name You really need to mention is Quorthon and his one-man band Bathory. Along taking Black Metal even to rawer, he invented so-called Viking Metal. From early Death Metal inventors Possessed is my favourite with their absolute debut classic ´Seven Churches´. But 2nd wave Scandinavian Black Metal was the real thing for me. Mayhem, Burzum, Darkthrone, Beherit, Satyricon, Emperor...the list is long, and Evil. Mostly Norse, some Finnish some Swedish.