Lightest rock subgenreHeaviest rock subgenre (not including heavy metal subgenres)Lightest heavy metal subgenreHeaviest heavy metal subgenre
Lightest rock: soft rock Heaviest rock: hard rock Lightest metal: symphonic metal and power metal Heaviest metal: death metal, black metal, or grindcore It's debatable though.
Lightest: Soft rock Heaviest: Heavy metal (it's a sub genre of rock) Lightest metal genre: Power Heaviest: Tie between doom, sludge, and drone.
