You've lost a little of her quizzical look here, probably due to how vertical her pose is. Notice that in the photo, her arm is slanted back and her head tilted - without that, there's less motion (and emotion). Also, the background seems a bit busy. It distracts from the model, who should be the focus. In the future, I'd go for less distracting colors on the background so the eye isn't drawn so much to it.
If you want me to go really
picky on you, her left arm seems a little awkward, probably because of how thin it is compared to the other.
I think the dress is lovely, though, and I like what you've done with the face and hair.