I think it's interesting that both Black Swan and Tron (2010) emphasize the quest for technical perfection and how perfection is only achieved by "letting one's self go". This theme comes up in many films, but something struck me about its repetition this holiday movie season. It was counterbalanced for me by True Grit, which has ostensibly nothing to do with perfection, yet the Coens seemed to let themselves go with some uncharacteristic emotion as Jeff Bridges rides a horse with snake-bitten Mattie through the night (e.g. long dissolves, CGI stars, exhausted horse dying, heavy soundtrack).