I'm sorry if you're not looking for critique but since you mentioned you want to tweak it, I'll give you my two cents. Feel free to disregardI think her right eye is a bit misplaced - cover it with your finger and you will probably see what I mean. I think it should be a little bit lower and maybe a little to the back. I'd also put her ear a bit lower (so the earlobe is in line with the base of the nose) and a bit close to the eye since her temple is rather wide. But I think you can generally fix these without major repaints. I don't know if you use Photoshop but if you have access to something similar to the Liquify filter it would work like a charm.