While not a perfect movie, The Princess and the Frog really does have a lot going for it, and sadly doesn't get the recognition it deserves for doing right.
Another buzzfeed artigo with similar pre-production hand-drawn scenes from disney (this time with three disney princesses; Ariel, Tiana, and Rapunzel) that showcase the beauty of hand-drawn animation.
A buzzfeed artigo with nine GIFs that show pre-production disney characters (including two disney princesses - Ariel and RAPUNZEL!) being traditionally animated.