That is a nice straightforward portrait...and that is not intended to be damning with faint praise. Straight portraits (without gimmicks) are hard to do well, and executing them well is a compliment not only to your photographic talent but also your ability to put your subject at ease, resulting in a pleasant and disarmed look.
The variation between the color temp of the flash and the color temp of the background is jarring. Some selective color balance adjustments would make this excellent.
On a side note, has anyone else noticed that the color rendition on the thumbnail is completely different than the popup image. I guess that thumbnail doesn't have a color profile attached or something.