This is a very good pixel. The shading looks amazing and the abimation on the pixel is spectacular. The way that the light hits the apple makes it look like a real one and the chibi face on the apple makes it look really cute. The stalk and the leaf are shaded in detail as well as the apple itself and this gives it a more realistic appeal in my opinion. I don't think I would change anything about this appart from make more and make them bigger! They are really nice and your artwork is really really good I love your work and feel that you don't need to improve as much as you might think you need too.
I Absolutely Love this Icon it Looks so adorable and like an apple with an adorable little face. Even though I have seen many of these this is the best One I've seen By far! I would be Proud to use this as an avatar and maybe I will :3 It Looks like you took a large amount of Effort in this as well which I love. I'm Rating Five stars for everything except for Originality which is 3 and 1/2 stars since I have seen like five of these apple things. However I can tell you this is definately amazing! ~♥