She's beautiful and her expression is magnificent! I also seem to have a weak spot for redheads hahaha, I don't really know why but I say to myself it's because their pale skin and sometimes bland expressions allow the viewer to find his own interpretation of the painting.
Well, as I said many have weakness for red hair, you are not first and sure not the last one :) Maybe among other things that red hair is not so usual and it can't be seen so often, than it's attractive so much.
Thank you for your kind words!