This has a lot of potential. On my monitor it is a tad over sharpened especially in the eyelashes of the right eye. Maybe because I have been looking at so many exaggerated diagonals, there is not enough in this. The bridge of the nose, which is the lightest portion of the face, is vertical. A slight tilt either way to get it diagonal might make the whole thing pop. If this was cropped out of a larger, there might be room to try it. Great expression on the model! (Still give it a 6, which is high for me.)
I'm completely missing the 'diagonal' connection here, so I have to vote this down a bit. Composition is nice, but I'd like to have seen more from her eyes - they're a bit lost. There's nice modeling on her face & would have come out more with a boost in contrast - I know that's more a matter of personal taste, tho'. Iit's easy to critique to death when you're looking for it, but I do like this shot overall! Good luck!
I really like the natural quality of the picture, the sepia tone adds a true richness. Except for lipstick & some minor eye makeup the model seems to be very natural. A nice capture.