thats beautiful and all your other humanized ponies too you catched their personality really alot better then most pictures I've seen^^ and I love fluttershys hair in here^^ funny thing is, I have really similar hair to her XD
This drawing also seems really well matched to the pony character. Her expression is just right with a look of 'waiting', with both worry and happiness at the same time. Almost as if she's waiting to see if an opportunity will come up for her to smile and get excited. She almost seems nervous, but like she's used to being that way. An excellent capture of this personality. The clothes also seem well chosen, they could look terrible on another person, - a loose, almost baggy sweater, a scarf covering her neck, but on her they seem pretty. A simple hairband and perhaps a "favorite necklace."