There's so much white in the picture that the deep purple mane sort of overwhelms it all, making it feel rather washed out. It feels like the rest of the image needs more contrast to be able to compete. I mean, I get that he's supposed to be white, but it might have helped the if the background defined his figure a little better, right now he looks like a wampa. A wampa with purkle hair.
You're welcome, I hope it didn't come across as too critical. Part of it is that I have bad eyes, so too much white is just too much. :/ My opinion, for what it's worth, remember how on Hoth they had more colors than just white? They had blue ice, and dark rocky outcroppings, and stuff to add character to the blank whiteness. I don't think a snowy cliff would really ruin the pristine look of the picture, and it would make the character stand out more. Actually, to me, a stark, snowy cliff would make it look even more pristine, right now the background is just sort of...bland, it doesn't really add any personality.
*chuckles* Well, I'm sorry to say but I don't think I can be bothered to do anything about the background. I kinda like it, and the client was fine with it - you can try bugging her to bug me to change it, though XD