Do you think people know when they sound terrible? I knew someone in MI who had that Michigander accent–nasally and just awful. Her name was “Jaaaaannn” if that makes any sense. I don’t think she was aware of it, but don’t know. Can someone who sounds like Janice on Friends really not hear that?
Do you know you have a bad voice? If so, why don’t you change it? In my late teens, I worked to change my voice a bit to make it more pleasant to the ear. It didn’t seem that hard to me, but it was only a small change, to be less nasal.
I beleive that people are very affected by bad voices. I know it is a huge deal to me–I have a hard time warming up to people with grating voices.