Quality of music isn't subjective though. There is objectively bad music as in poor construction and composition. However, it is personal preference to say that you like or dislike a genre or style of music
Correct. But what The Butt is talking about is not the parts of music that are not subjective; he's not talking about the actual construction of the track, the melodies, harmonies, or anything of the sort... the things he's talking about are purely the subjective areas; What is good and what is bad in his opinion without any regards to an actual scale, what he likes when it comes to metal versus what other people like, and what is 'true' metal and what isnt.
Bounty, again you only read what you like. I don't hate metal with clean vocals. I hate METALCORE with CATCHY, CLEAN VOCALED CHORUSES, and BREAKOWNS, and squeaky clean production. Its poorly composed, generic music.
I'm not reading what I want, and I wasnt stating that you (The Butt) hate any and all music with clean vocals, I was talking about the subjective aspect of music and how opinions can differ. The 'royal' you or whatever you wish to label it. You (the person reading this, not just The Butt) can like thing A, but another person can like Thing B.... in fact we didnt even get into the point that someone out there likes both A and B, and that someone likes neither. It was a very simplistic example.
Also metalcore is not metal. Its hardcore with metal elements. It is metal in NAME only.
Says you, who has neither the right nor the position to claim what is or isnt a particular genre of music. But see Arqwart's comment above regarding the folly of trying to overclassify everything. Metalcore is one of near 30 major subgenres of Heavy Metal music, and just because you feel it doesnt belong doesnt make it any less true.