I have to revise my opinion of Tangled. Though the story (and especially the songs) are virtually a parody of a Disney film (like Enchanted was), and the character designs were rather bland, I still have to say that I think this film raised the bar for 3D feature animation in almost every way. Besides some impressive advances in cloth and (naturally) hair, the broad performances had a hand-drawn plasticity that you rarely see done successfully in a CG film-- extreme squash and stretch, and even some Clampett-like smears, which I wouldn't think you could get away with in three dimensions. But there were some exquisite bits of subtle acting as well, close-up on the character's face and you could really feel the emotion as if it was a living breathing person rather than a CG puppet. Most of these were on Rapunzel, who turned in one of the best animated performances I've ever seen. The film was also nicely edited-- definitely a modern style, but it worked well.
Don't see this movie in 3D. It adds nothing, and it subtracts from one of the best things about the film: the color. OMG the color. So delicious.