I was litten from the start, but it's getting harder to choose between it and Rowlet. Decidueye is my favorite final form by a significant margin, but I like the Litten/Torracat over Rowlett/Dartrix, and fire over grass. All three starters are interesting though.
I really like the designs of Tapu Lele and Tapu Fini. I'm particularly interested in Tapu Lele as I run Gardevoir a lot, and would like a new psychic/fairy type.