So soft, beautiful, luminescent, and simply adorable. This picture made me smile just to see it.
Great pose captured; the tail wrapped round the body, hunched together to focus on the visible face. The soft white ruff and luxurious fur softens the lines of your cat while letting the sharper features of his (her?) eyes, ears and nose peek out to the viewer.
The off-camera focus is captivating and the use of a blurred background, softly lit and pastel colored, compliments the fuzzy, fluffy kitty.
With the photo nicely balanced so the eye is drawn right to the middle, and right to the face, I can't really think of anything to note for improvement. Great photo!