So..subtle changes to the skin shader, and using an old Kodak polaroid as a base for post. I think the distortion is too much, but I won't argue with PTLens. Maybe I remember polaroids looking better than they did.
I'm quite happy with the result, regardless the distortion. The skin looks relatively solved for me, but I still think the hair and the lips look bad. And the expression is...well, bored, stoned or constipated would be better descriptors than the annoyed I was going for.
Any feedback?
EDIT: Here's the original render. And yes, I know polaroids were more square-ish. I remembered that after the render was done.