Obviously groups that incorporate elements of both rap and metal are fairly popular such as the aforementioned Korn, Rage Against the Machine, Deftones, and my personal fav who unfortunately broken up, Stuck Mojo. Do you consider these groups metal (why/why not)? Or alternatively, are they are a genre of metal or just another genre of music? I personally don't have a strong opinion about the whole thing, though I have to confess that when I think of metal I usually view Iron Maiden circa Powerslave/Number of the Beast as the prototypical metal band and then judge all others in similarity. I also perceive metal as tending toward minor keys (tone-wise) and eschewing the blues influences prominent in post-British invasion rock and roll.