For me, this photo is the most interesting of the three. I like the light - there's not a lot of it, but it's sufficient to just reveal her expression, which I consider a major strength of this photo. The twinkle in her eye, the smile, the tilt of her head - from all these signs, I get not only the impression of obvious good mood, but also something deeper, a sense of a hidden, private joke she is enjoying and that is contributing to her feeling of happiness at this moment.
I would, however, prefer to see more of her neck and shoulderline.
splendid shot.. lovely expression and look.. successful breaking of the rules when u made the background focused.. i would just prefer u showed a little more of her shoulders regards