I don't think Spitfire has ever looked better. Which is really saying something, since she almost always looks awesome. I really love the warm sunset colors, and her annoyed expression. Thanks for sharing your art!
This is really some beautiful coloring, I'm absolutely keeping you on watch now! Come for the ponies, stay for the art, amirite? Specific to this piece: I really like her mane! Honestly, it's my favorite part of the piece, it's illuminated in such a cool way. The warm colors in the bottom right bending to cool toward the top left, with the character outline so well on both sides with different shades... it's seriously great. From the few other pieces I've seen, that's par for the course with your work. Keep it up!