It's all very subjective. I gave a tape of me singing to an old friend because she asked me to, and she took it to work so that she could listen to it - but her work is teaching autistic children and she found that playing the tape calmed them down, so it was a useful work resource. She said they liked the sad songs best, perhaps because they could relate more closely to the mood.

I find that the "little girl" voice sounds shallow. But this is a very longstanding debate because I wasn't impressed by Shirley Collins' singing when I first heard it, as I thought she just sounded like an untrained and childlike singer - which of course she was. Some of the most moving voices aren't very musical.