Like the balance of color, the yellow and blue is radiant but the face retains a natural tone. I like that is eyes are looking right at the camera, making a statement. The background colors are a bit washed out but not too sure that bright color there would enhance the image. good luck 8
Are people asking for more environment? I think this is a great portrait, but I really can't quite tell what you are doing. Don't let the low score reflect on the overall quality. If there is a technical nitpick, it is the overexposure on your head. It's possible that is an artifact of USM too. 5