Pretty much anything by Converge - watching those hardcore 'kids' kidding on they like it, when really, they just want to dance to Green Day.
Textures, Nachtmystium, Death, Deicide, Carcass.... etc, etc
Lots of hardcore, death metal, black metal, satanic metal, thrash examples out there.
...and an ex who said she loved Throbbing Gristle till I got out a whole DJ box of it. She dumped soon afterwards.