I think her face is overexposed (where her hair meets her face) and I would like to see a tighter crop everywhere but the bottom. I feel like it is missing something but can't put my finger on it. Have you tried this in black and white? That said, it is not that I dislike this photo but think it can be better.

Cool portrait, the setting is unusual which makes it interesting. I'd go for a tighter crop myself.

Maybe a bit tighter crop but I like the textures included in this shot. And the color.I would like to see her face close up but that's another shot. As it stands, I really like this one.

I agree with a tighter crop, but this is an "unexpected" portrait, I like it. I like her facial expression and positioning.

I like this portrait; it looks like you're getting a bit of barrel distortion which could be corrected in photoshop (unless the wall behind her is curved); other than that it is really nice.

For a portrait she looks very uncomfortable, like she can't wait for it to end. Her left hand is almost pushing her up off the seat. I think it would have worked far better as a shot if the model was sitting comfortably and naturally.

I agree that the posture seem uncomfortable, just like the posture of young and sexy models in fashion magazines. But to my mind, this just adds to the "unexpected" atmosphere of the portrait. I also like this tender vision of an old person, which is not condescending at all.