I feel the same way. Part of that is Mikael Akerfeldt's sweet "normal" voice. One of the most powerful, emotional singers I've heard.Yeah, I just can't listen to it. The only band with cookie monster vocals i can listen to is Opeth. He only does it half the time and the music is so great that I can live with it.
Well, with bands that have names like Cannibal Corpse, I certainly don't expect Tiny Tim. A lot of the screamo stuff just sounds really badly over the top. As far as black/doom metal bands go I far prefer growlers like Tom Araya.Its hard to pull off, sometimes it fits the context... makes no sense for a Black Metal band to sing like Tiny Tim for example.