What you're talking about reminds me of those tree diagrams for Rock music. I always found those helpful in terms of understanding the relationship between vari

What you're talking about reminds me of those tree diagrams for Rock music. I always found those helpful in terms of understanding the relationship between various subgenres. I did a quick google and found this: http://www.maximummetal.com/images/metaltl.jpg http://www.maximummetal.com/images/metaltl.jpg