Wonderful! You have done an great job in emphasizing the important part of your piece and leaving all other background elements impressionistic, with the exception of the tips of your hooves. Right now they look like they are blending in with your background so you might want to define those more especially sense they are metallic.
Wow, this is so beautiful! A really stunning picture. Luna looks so pretty, and the background is wonderful. You managed to capture the feelings here really well, and the coloring is absolutely amazing!
A Brony my friend is a Boy who likes My Little Pony. Usually refers to the MLP: Friendship is Magic version of the show. Admittedly I have "joined the herd" as well and became a brony over the summer. (I blame sme fo my friends who have been bronies for years)
constructive criticism: her rightwing is pointed in the wrong direction, left wing angled backwards for flight, right wing angled forward to brake(though if she were braking, her body would be angled differently aswell) her cutie mark is reversed her horn seems.. off
nevertheless this is my favourite picture of Luna, so you did an awesome job regardless of those small flaws