In all three the horizon line's tilted just a bit, so little so that it does not look like an intended tilt but like a compositional flaw.
And something feels not quite as right about the lighting in the last, as if the reflector had been too close to her arm ... but that strong "back shadow" of her arm on her body, while the main light clearly comes from what to us is the left side of the frame, is distracting.
She holds her arm in a very funny or strange manner in Photo 2. As if it were not there, only a hand attached to her other arm.
I really like the lighting in these...although in the last one, it seems to be making her legs look larger than they probably are (she's obviously a very fit model)
In #1, her elbow is cut off, and I don't like that, but I do like her poses and all of these! Nice job!