I'm not a metal fan, it all seems a bit fake to me, lots of dressing up and posing. And the music is usually formulaic and frankly a bit weak. For "heavy" music, by which I mean challenging and sometimes even disturbing, I'd listen to Suicide, the Birthday Party (particularly the Junkyard album) and something like Scott Walker's soundtrack to Childhood Of A Leader - that's very chilling .
I appreciate I'm probably in a minority here .