i think this and the other post with the same girl in red could both use some better direction assistance on your behalf. You have to tell the model what to do b/c you essentially are their mirror.
#2 has the most pleasing expression compared to the rest but her body is ill positioned for the frame. that should greatly help the photos
I think these are a nice improvement upon your last posting. #1 and 2 are much better. The model looks more comfortable. In 3 the model looks confused. Try having her look somewhere away from the camera. It will give your model more dimension and may very well accent some of her facial features better. Also try doing some mouth shape exercises with your model to find a natural looking yet attractive look.
But #2 is by far your best. The model looks much more comfortable and relaxed.