So, on animated features:
I liked Brave a lot. I didn't love it. I felt it was missing something. Maybe it was the buildup, but I felt like Brave really should have been a very epic movie. Instead it was concise and nuclear, oriented at a family drama. On subsequent viewings, I find I like it more than I did previously, but I have never truly loved it. I love Merida. I think it's great that she's both a bratty kid and a decent role model for young girls (not necessarily a bad combination, mind you). I just feel that the story could have had ... more. I cannot come up with anything more objective. (still like it!)
That said, I am not a Disney fan or fanboy. I liked a few movies in the '90s animation revival a lot: Beauty and the Beast, The Lion King, and The Hunchback of Notre Dame (honestly, you should be condemned to hell for not liking anything Tony Jay has done... f you, if that's the case). I am not a fan of typical Disney princess girls beings damsels BS like The Little Mermaid and Pocahontas. I didn't like Hercules because, despite James Woods semi-awesomesauce, the movie was one big mis-interpretation of Greek drama into a modern religious and contextual sentiment that not only didn't work for me, but flat out appalled me (and I normally liked the "En Vogue" (and countless predecessors) style).
However, Frozen should win this. Hands down.
I love Miyazaki. I think Princess Mononoke and Spirited Away are two of the best and most thought provoking films of all time. I love alot of his other films, with Kiki's Delivery Service and Howl's Moving Castle as other amazing stand outs.
I have not yet seen The Wind Rises though I'm really anticipating it. I hope it's truly awesome, though I'm getting a strong Grave of the Firelfies (truly great movie) feel from it.
Still, Frozen actually (finally!) destroys traditional female role-portrayal for western mainstream animation. Both Elsa and Anna completely break away from the "true love's kiss" bullshit and "someday my Prince (a boy, obviously) will come" crap, that has been dominant in our culture and, if for nothing more than that, they really deserve recognition.
I have a 3 year old daughter and this is really relevant to me. She adores Elsa, for which I am very grateful. She also loves Cole and Jay from Lego's animated Ninjago series and all of the Mane 6 from MLP: FIM (all of which I'm really grateful for). Elsa and Anna are strong role models for American girls, compared to (fucking awful) Ariel, Snow White, Cinderella, and (the worst of the bunch) Sleeping Beauty (whatever her irrelevant name is).
For this alone, set aside the fact that the movie is both really well done and, finally makes a comedic sidekick that isn't another Jar Jar, I would give a huge nod to Frozen.
Also, Let it Go is Defying Gravity done correctly. It has proper song structure (Defying Gravity is great, but it's not a single song, more of a series of semi-related song-vignettes), good melody, and an absolutely masterful performance by the (currently incomparable) Idina Menzel. Even Lea Salonga (a truly elite tier superstar voice) can't stand up to her on this.