Good growling vocals sound just as natural to me as good clean vocals. I think the problem is people are so use to listening to something specific it affects other music. Anything can be normal when you get use to it.
If someone listens to just slow music or music at a certain speed fast music is going to sound like noise. If a person just listens to fast music slow music is going to seem to slow.
If someone listens to just slow music or music at a certain speed fast music is going to sound like noise. If a person just listens to fast music slow music is going to seem to slow.