Background does not flatter the subject, it makes it difficult to decern the subjects hair. I personally don't have a problem with the off centre head, except that it allows more of the background through.
The photo itself is blown out. Regardless of what you were trying to do with her skin and what not, the shirt and parts of her face are overexposed. I'd say her eyes are almost over exposed. I can see slight traces of brown in them, but they don't stand out.
Did you use a flash? Seems like that might be some of the problem. If you did, bounching or not having it directly hit her face square on might have helped out a bit.
Disclaimer, I'm a noob too, so take what I have said with a grain of salt.