I was gonna post the Map of Metal myself, but I was beaten to the punch...
Gotta love the occasional bit of "I don't like that particular style, therefore it isn't metal"...
Clarification: Glam Rock is metal, Hardcore is metal, and the old genre colloquially known as "heavy metal" (epitomized to some, including me, by Iron Maiden) is
definitely fucking metal.
Even Iniquity is metal... they're just crappy metal.
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**edit**
One thing I forgot to mention: there is also
man who epitomizes everything that metal should mean. That man is Lemmy Kilmister. As Dave Grohl once said in an interview for a documentary:
"Fuck Keith Richards, fuck all those dudes who
survived the sixties flyin' around on Lear jets, living up their gunslinger reputation as they fuck supermodels in the most expensive hotel in Paris. Y'know what Lemmy's doin'? Lemmy's probably drinkin' Jack&coke and writin' another record."