Yes Black Sabbath the Godfathers of metal, and Guitar tricks for that matter. sure blues and R&B are the true roots but they really took a big step forward. Lead guitar player Tony Iommi's bluesy style and technical wonder on his axe made him a ledgend and a huge influance to 1000's of bands and guitar players inclueding myself of course. Oh, yeah Ossie Osboure*as he was known back then* also provided commanding, ungodly vocals and great ideas to the band, but all those years of Acid and very hard tour life have taken there toll on ozzy, and yes you can see a wonderful exsample of this in his show on MTV "SHARON!"