I agree but I wanted to point out this part in particular, and say this could really apply to metal as a whole. I think people associate metal with stuff like... sixto sounds, which is more along the lines of hard rock, and pretty accessible. I think when metal starts approaching the more extremes, it enters the subjective acquired taste area.. djent, metalcore, black metal, death metal, schizo hospital metal (it's a thing), and so on. I stand by thinking that the diversity of metal is not so wide yet and with some help we can fix that
edit: I should have refreshed, didn't see your post there Larry I didn't mean to contradict you or anything
Just to post a couple more things here...
Here's Harjawaldar's I den Svarte Skogen mentioned in the talkback --
And here's a metal vocal style I want to try, it is unconventional.
(at 0:32)Guy sounds like he's a smoker, half scream, half voice, many effort, so scream, wow