I love heavy metal music, I like alot of bands like Ozzy and AC DC, do you know about heavy metal music? 
I'm a total metalhead so yeah I know about it. It's a genre of rock music from the late 60's and early 70's which started mostly in the United Kingdom.
Thats cool, Never knew it started in the UK, What were some of the first heavy metal bands anyways? 
Well, in 1968 the most famous founders of heavy metal were Led Zeppelin, Black Sabbath and Deep Purple, especially Black Sabbath. I remember when I first heard Black Sabbath, I loved it.
Heck yeah those guys are legends and the best out there, What was the most sold heavy metal album? It had to be AC DC or metallica.
the genre's evolution by discarding much of its blues influence; Motörhead introduced a punk rock sensibility and an increasing emphasis on speed. Beginning in the late 1970s, bands in the new wave of British heavy metal such as Iron Maiden and Def Leppard followed in a similar vein. Before the end of the decade, heavy metal fans became known as "metalheads" or "headbangers".
During the 1980s, glam metal became popular with groups such as Bon Jovi and Mötley Crüe. Underground scenes produced an array of more
summarized it in a 2006 interview:
Yeah sure, we see ourselves as a metal band, but without boundaries and limitations to our sound. We do not necessarily belong to a certain subgenre within metal. We're just playing dark and heavy music and keeping an open mind to evolve and being true to ourselves. I'm proud to say that I believe KATATONIA sounds like no other band. We have eloquently avoided the gothic metal genre most bands tend to fall in when changing their sound from doom/death metal to