Namiko: Without being presumptuous, maybe it is that it is difficult to discern the nature of the emotion or the cause. I suspect this in you since I am the same. Of course, you feel emotion (me too). But, I often cannot know why. I do feel but cannot express or articulate since this function is foreign. Further, by nature, I am rather somber and impassive. By analogy, it's like being feverish and not feeling well physically. I know I am sick, but I cannot necessarily diagnose the problem without further investigation (ie: do I just have the flu, or maybe it's denge fever? Hmmm). Unlike a physical ailment, emotions are difficult to "diagnose." Yes?
Also, about identifying an individual by their voice: I often identify people by their coloring, especially what kind (colors) of clothes are typical to them. Most everyone has fairly distinctive tastes and gravitate to a certain color palette.
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The ones who say “You can’t” and “You won’t” are probably the ones scared that you will. - Unknown