Several points about "good voice"---I am totally deaf in my right ear, and only have about 65% in the left. I CANNOT hear myself as others hear me. I have listened to myself on tape and it's not the quality that bothers people, it's the fact that I cannot hear and make the correct intervals. I'll be doing just fine, and then all of a sudden, WHAM--I am way flat or sharp, or clear off key altogether. This doesn't bother ME, but it does bother people I am singing with. I play fiddle mostly by seeing my fingers, and by sympathetic vibration, and do OK. However, when our daughter was 2 days old, I tried to sing her a lullaby.......she OPENED her eye, let go the teat, and stuck her little tiny fist as far in my mouth as it would go! Needless to say, I have never sung to her again. She is now 15, and has almost perfect pitch. My deafness is congenital, but disease related rather than genetic. (My Mom had rubella when I was in utero) I played in a civic orchestra the whole time I was preggers with the daughter, and I KNOW she could hear what was going on, and I am sure it has affected her musical development.