I am not going to do every sub-genre of Metal, just the most popular. And none of this is negative.
Doom/Black/Extreme: atmospheric
Death: Brutal
Power Metal: uplifting and imaginative
Thrash: anger and rhythm
Speed: anger and speed
Progressive Metal: technical
Melodic Death: melody and anger
Hair: sex, drugs, and rock and roll
Nu: teen angst
Doom/Black/Extreme: atmospheric
Death: Brutal
Power Metal: uplifting and imaginative
Thrash: anger and rhythm
Speed: anger and speed
Progressive Metal: technical
Melodic Death: melody and anger
Hair: sex, drugs, and rock and roll
Nu: teen angst