Looks like a serious but quirky expression. The stripes make your look down to view the whole scene. Like all portraits highlights in the eyes make it interesting.
I think that the choice of the border may have cause the score to become lower. Comparing the black in the border to the black in the subject makes the black on the clothes and the hair look faded. Bringing the contrast up in the photo would match it more to the frame.
I thought that this shot would have scored higher. Seems like I was the only one that gave a "10"
i think that the bold black border goes well with the bold stripes and was a good choice. two things bother me though. the first is the eyes. they seem to be staring past the viewer, and aren't as engaging as they could be. the second is the slight change in the background color starting from left to right, going from pink to almost white on the right. it's just subtile enough to bother me. maybe shadows caused one side to seem darker than the other. whatever the reason it's not as important as the eyes.
What a fantastic model you have there. Very very natural looking, almost candid, rather than poised, yet it is obviously a posed photo. Great lighting, great model, great pose. Love it.