Films that feature "fractured" chronology, with frequent flasbacks and flashforwards, elliptical plots, etc. often benefit from a second viewing. This applies to the above-mentioned [i]Mulholland Drive[/i] and some Kar Wai. Also, films with meanings and themes that are open to interpretation (like Tark's, maybe Antonioni). I also find that anglophone audiences fail to appreciate fully the films directed by Jean Renoir, in which the precise timing and nuance of dialogue and gesture are lost to the subtitle-reader. This is true even when the translations are accurate, which is not always the case. Once you are familiar with the text and basic narrative, watch again to enjoy the rich characterisations and impeccable ensemble acting.   