I said "the skill of the singer" has nothing to do with the quality of music, and i disagree with you completely, how is Ozzy crap?... Because he's not a opera singer?... There are way more important things than skill, Black Sabbath are not like every other metal band, technical skill is not what made them who they were.... Ozzy's voice suited the band perfectly... When Dio joined, the band disolved into the standard "been there done that" heavy metal band, complete with overbearing falesto wails and unnecessary shred solos.