Your favorite? No wonder she turned out the best of the bunch. Her shy smile doesn't seem as nervous as usual: though still shy, I think she's actually happy to be noticed. And why not? You made her look gorgeous here.
So, is this current set an experiment in using limited color sets and tones for each pony? Or just having fun and it happened to turn out that way (and you left the color key for fun)?
It's a bit of an experiment because I really like limited colour palettes (I was looking at Nitlo's pony art on Pixiv) and I wanted a set of six that looked similar to make a postcard set for ponycon! :3