I'm just going to go through each category here, because I absolutely love this image, and I want to get each of my points across.
Vision: If you were trying to get the point across that Rarity is the best pony, you succeeded! With the sultry eyes, sly smile, and the way the hair falls just so, it really gives off that "I'm the best" vibe.
Originality: I've seen wet haired Rarity before, but never quite like this. She's in the bathroom, fresh out of the shower, steam still lingering in the air. When it comes to Rarity, this is pretty original.
Technique: Your style is incredibly good, and very distinct. I can always tell when a piece is yours because of the faces, head construction and color choice. You have a great knowledge of color, form and shape, so you absolutely get 5/5 stars in this category.
Impact: While this may be the lowest rated category, it's not bad by any means. It doesn't hit me emotionally hard as some other pieces, but the thoughts are definitely there. For example, 'beautiful' comes to mind, as well as 'sexy'.
Overall, it's a very well done piece, and certainly does Rarity's character justice in terms of looks and attitude. Wonderful job.