*reads sig* You like BURZUM Foxypage? After mine own heart are thou?
I can't say I like everything, I only like the few things that connect uniquely with me. But I looooove me some growling and screaming. Singing, honestly, seems kind of silly to me compared to screaming. A scream is something real, something you find in nature. Singing, what's that supposed to be? What're you, a bird? Or worse, a bard?
Of course I love 'em both and probably 95% of the music I like is regrettably lax on the screaming. But a good scream is worth about a million stanzas of mere singing. And someone mentioned music for relaxation... at that note I must express how harsh vocals can be
excruciatingly soothing. Think of how very deep some of these voices are. Like Barry White plus more. Then take into account the innate hypnotic rhythm inherent in music which makes use of note repetition and extensive vamping. Then add the fact that the lyrics can be indecipherable, so that you have no choice but to sync your mind into the melody of it all. I'm not into the melodic stuff myself, but I've known several people who use extreme metal as their means of calming down and relaxing.
Actually, add in the fact that the songs are frequently in the double digits minute-wise, and their elegant, sprawling suite-like nature. I'd put on some extreme metal to relax before pretty much any other genre.