That's a nice effect you did with the veil and the that background, gives it this neat photography-ish feeling that really fits the "once in a lifetime" theme of the picture.
But I can see why you aren't satisfied. It's the eyes, they're too far apart and just staring you from the middle of the drawing with all the lines leading you straight back to them. Just don't give it too much thought, we all have our highs and our lows.