I'm personally interested in any song that stands to tell an interesting story. Music has a long history of murder/death/rape suffering songs. Just ask Johnny Cash.
True. But a lot of them are different, somehow. I never, for example, felt dirty or guilty listening to a Johnny Cash song.
It's hard to explain. Part of it may simply be because I'm a military historian, with a particular interest in low-intensity conflict. I read about death and suffering and cruelty all the time.
So on the one hand, I don't feel any need to explore those sorts of things in my spare time, listening to music. I get enough "brutality" at work.
And on the other hand, death metal--at least, that sort of Cannibal-Corpse-type Florida death metal--doesn't exactly explore these things in a mature or insightful way. It's just unrelievedly ugly, both lyrically and musically.
Now that I think about it, I react in a similar way to a lot of art that deals with abjection and the abject. I often find it pretentious and jejune, and I dislike it as much for its pretentiousness as for its grossness.
There is
one death metal band that I do enjoy listening to, and that's Nile--partly because the lyrical content is quite different.