Yes, it is my art. ^^ It's not my best by any stretch of the word, but I wanted something pastel and cutesy to match my icon.
My favorite pony? Hmm... For G1, it'd have to be Munchy! G3, I love Triple Treat, Chocolate Chipper, and honestly, just any sweets themed pony! For G4, I love Plumsweet and Glimmer Wings Sweet Song. :]