Listening to the first couple of tracks from Death Mask/Lord Mantis.
It is pretty grim, devoid of light and devastating as promised. This is one case IMO where the vocals fit the music. Grim-bleak-raw-just right for the album.
That's what I ask for-vocals that add something.
In recent years, I feel let down with generic extreme vocals often feel pasted on without much thought. As a metal fan, I think we should expect the same level of skill in vocals as any other musical genre.
A few that come to mind that I actually think add something to the music: Mortuus (Marduk-who should get an Oscar nomination), Mikael Akerfeldt, Martin Van Drunen (Asphyx, Hail of Bullets), Abbath (Immortal), Ihsahn (Emperor), Tomas Lindburg (At the Gates), Nocturno (Darkthrone), Shagrath (Dimmuu).
But usually-it's the music that carries the day for me in spite of the vocals.