Animations aside, i just don't like how my character always looks like she's about to cry when she shows any sort of emotion. I tried a human pally and a tiefling mage and it's the same.
I mostly play High Elves and use the same head model (I think it is 3), my character usually looks quite calm. It's odd that the facial expression for the different head models seems to differ so much, although they all have a neutral/calm expression in character creation.
I wouldn't like it either if my character would look like she's about to cry.