The place of overt emotionality in singers is something on which there is perhaps the widest diversion of tastes. I tend to think it gets in the way. I think the emotional impact of of a song can actually be a lot more powerful with a singer who is, on the face if it less involved - "emotionally detached" as mandotim puts it.

I'm not laying this down as a rule for all songs, or suggesting that there is anything wrong with people having a diametrically opposed preference. But this way of singing shouldn't be seen as a failing on the part of a singer, but rather as a deliberate choice, and one which is in keeping with many/most traditional singing in the British Isles.