Unsound, I think you example of the balance in salad dressing is spot on. Not to be too mystical but, to me, balance is important in most everything.
As far as others' discussion declining hearing being a problem, it has already been mentioned that there is FAR more to hearing than just frequency response - distortion, timbre, harmonic presentation, etc. As someone else mentioned, I have trouble picking out voices in a noisy environment, but put me in front of my system in a quiet room and things are wonderful. Add to this the likelihood that we all hear things differently and anything more than generalization becomes difficult if not impossible.
As far as others' discussion declining hearing being a problem, it has already been mentioned that there is FAR more to hearing than just frequency response - distortion, timbre, harmonic presentation, etc. As someone else mentioned, I have trouble picking out voices in a noisy environment, but put me in front of my system in a quiet room and things are wonderful. Add to this the likelihood that we all hear things differently and anything more than generalization becomes difficult if not impossible.