I like teh side view. The pose of the hand adds a feeling of frustration for me, while her facial expression seems more contemplative. Perhaps that is your intention but my eye keeps being drawn to the hand. I like the contrast, but the face and left shoulder have lost some detail on my screen. Nice photo.
This is a rather good portrait you have made here. The closed fist is at odds with the elegant feminine pose. On a technical note you may have burnt out some of the facial highlights so use softer light and for more even lighting you may want to reflect some light onto her back.