In one way or another, and in styles ranging across my spectrum of moods, I have prior and piece-by-piece added solo pictures of each of the Mane 6. Save for Twilight, that is. I just never really had been in the mood to draw one. She seems to me to be a character that gets quite a large amount of attention, and my interest tends to lean towards those types that don't get a lot of notice (which is the primary reason I first started a guardspony story way back when).
Anyways, tangents; here is a picture of Twilight. She has just finished reading Starswirl the Bearded's treatise: "An Astronomer's Guide to Passing Out on a Cliff Side and Not Rolling over the Edge after a Full Night of Stargazing."
They can squeeze quite a lot into those scribbly characters of theirs.