Grindcore would be more of a progression from (sludge?) like CoC.
for someone who dislikes grindcore you sure know quite a bit about it.
I try to avoid hating things out of ignorance, because that's stupid. I listened to quite a bit of grindcore before deciding that the genre doesn't interest me at all. It sounds ridiculous and stupid to me without exception.
Not sure if you would consider this "controversial", but I cannot get into Satyricon at all. Don't understand all the praise...
EDIT: Also, I think Esoteric are EXTREMELY fucking boring.... at least "The Maniacal Vale" is.