I really don't enjoy black metal at all, and Varg's attitude made me have a pretty bad prejudgement about Burzum, so I only tried listenning once, didn't like the vocal and there's no melody on the songs, just instrument's ramming 24/7

To me, I don't care what is the genre, what the lyrics are about, if they're satanist or christian, if they are deep or senseless. What matters most is the medoly (which black metal has none)
But I also like heavy stuff, and the heaviest I can go without losing the melody is with Melodic Death Metal such as Arch Enemy: (which I'll be going to their concert on this friday and I'm so excited god damn it)