Well, this is what I thought right yesterday when I saw this photo for the first time: I quite like the fact that the face is not in the sun, so it does not catch too many harsh shadows but comes out smooth - and I very much like the light from the back lighting up her hair and her EAR. I just LOVE this "translucent" ear!
I'm one who tends to take horizontal portrait photos, so I will just whisper in MrSid's direction, that this way is MY personal preference in portraits. And I find your, Shark's, wife is placed well: the back of her head to the smaller right, and a larger part of the photo left for the direction she's (or might be in the next second) looking at. I'm happy about as much of the background as there is, diffused as it may be by a perfect DOF, because the background COLOUR, along with the quality of light, make obvious that this was taken in autumn.
Not forgetting to say that you're blessed with a beautiful wife, Shark!!!