Ingres Portrait of Bertin
Let me say, I think your work is beautiful!
I have provided a link to the image of the orginal for comparison. Be sure to follow link for detail!
As mentioned in earlier post, I believe the sharpness of the nose and closeness of the eyes in your rendering give a modern effect. (Modigliani was a famous modern artist who frequently centered features and streamlined noses without losing the likeness. I invented the word "Modigliani-ization" to make the comparison.)
More specific explaination would require a side-by-side analysis, which I am unable to provide. I am asking Santa Claus for Photoshop this Christmas.
I hope you will allow for "mistakes" in your art and in life. Sometimes that's where true beauty lies.