Last three albums = nu-metal influence. They also happen to suck. I only listen to Lunar Strain through Clayman.
I absolutely cannot get into grindcore. I think black metal does have some contradictions, at times. And most brutal death metal repulses me. But I wouldn't call any of these genres bad.
Metalcore doesn't really seem metal to me - mix of hardcore and metal, but the image and lyrics seem more hardcore/emo based to me. I'd be willing to accept it as a genre of metal. Nu-metal and rap metal, however, are not metal. It's angsty, emotional, and angry, it's based on downtuned, simplistic guitar bits and drum rhythms, and it just plain sucks.
I don't like stoner metal, but I don't listen to much of it. Same for doom metal.