I would say you've got shape down spot on. And your color choice is very beautiful. The thing that bothers me, is that there's no texture. For instance, just by looking, I have no idea what the black and gold cylinder thing is. The leaves of the tree look like they are made out of pillows and blankets--which is not how really are. The same holds true for the statue of the head. It's supposed to look like stone, but because of the way it's lit and colored looks to me like a plastic sculpture. Then again, the dark robe--the colors are awesome! But it seems to be made of the same substance as the stone head, the cylinder thing, and the trees.
Now, with everything having the same texture like this, you achieve an nice soft, fluffy atmosphere, and if that's what you're going for, more power to you. But I think it would help to add a little more detail to what you've got.
I think the answer is imperfections:

(yeah, I know, 1x pixels on 2x pixels, eww, but it shows my point still)
