Well, since this thread is refreshed I'll put in my two cents. As long as it's genuine and not overdone or theatrical, I like it when the singer puts emotion into the song. Although Kate Rusby, Cara Dillon, and some others I can't think of right now have beautiful voices, I often feel a little frustrated - like something's missing. I like a voice with feeling and dare I say it...passion. Niamh Parsons comes to mind. I am aware that there are two very different schools of thought on this and I'm not putting down those in favor of "detachment" but it isn't what I prefer.