Thanks for the feedback! I agree with Fluttershy's hair needing a bit of extra "poof." As for the wings, that's the best of my ability at the moment. That's going to be the major thing I work on. =)

I can't help but think Big Mac should be bigger. And Applebloom's head seems a bit too big. And the less said about her bow the better.[/SPOILER]
Ooh, I like your sketchy style. I agree that Big Mac should be a good bit bigger. As for Applebloom, the bow is fine, in my opinion. It looks good. =) I think her head should be smaller and...the eye a bit more oval? Her eyes are very round in the show, a sign of youth, but I think it needs just a tiny bit of elongation or heavier eyelashes.

I also second the call for improvement to color. If I even so much as ink in one of my sketches, it turns very flat and loses so much depth. The search for a color expert begins!