Djcoolray,
I agree with you that music can be very subjective at time, but it is not arbitrary. There are objective elements that we call neutrality and accuracy which allows us to hear the music the way the music creator meant it to sound, instead of the way the listener wants it to sound. There is nothing wrong to try to make music sound the way we like instead of the way it should be, but it is not what High Fidelity is about. It is not difficult to compensate for the SPL response curve of the HD280Pro, but it just makes the bass transient and sound stage worse. The HD 598 I like is NOT a high end phone by any stretch of imagination, but it sounds neutral and has tight, natural bass. Yes, it is all a matter of personal like and dislike in music.
Sennheiser created the Monitor series of headphone to compete with Bose and Beats because they see where the market is going.