I don't mean offense to the photographer or the model with this critique, but if your model was to squint her eyes a little bit, or "smize" (smile with your eyes) as Tyra Banks says, there'd be a little more intensity in the shot...(which, by the way, is beautiful!)
good pose, pretty woman and the eyelashes do add something. Clever use of hair for the mystery factor. I am not a photographer yu are welcome to check my newly started gallery
Good work... incredible colours... and very beatyful model.