So what do people look for who are into heavy metal or hard rock ? ( musically that is )
A huge voice [Bruce Dickenson, Eric Adams, King Diamond etc]
great riffs [Iommi, Young, the old Hetfield etc]
cool melodies [Priest/Maiden etc],
powerful drums [Bonham, Fenriz etc]
aggressive bass [Demaio, Harris etc].
But most importantly ATTITUDE. Heavy metal is a way of life! Bands have got to live and breathe what they do.