I thought the way you draw cool (I like cartoon). Shading was also cool.
Now about the background, and I think you should give this part a little more attention. You cared for by mountains, clouds and leave well decorated. However, I think some more mountains in the background, some small clouds, and maybe, if it is good, the sun would look great.
Sure, it's only my opinion. Good job. I'm not a fan of MLP, but I thought it would be cool to do a review, since I liked the way you draw (like I said, I like the cartoon style).