Depends, I'd watch Casshern in your case. This is one movie that shouldn't be underestimated.

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My purpose, is to find purpose.

amour moi et moi seulement

Seconding these two, although the comedy in Dongmakgol is more of a black and cynical kind, rather than light-hearted laugh-out-loud comedy. It's actually a pretty serious film, especially towards the latter half.

I'll add The Good, The Bad and The Weird. An utterly insane and side-splittingly hilarious surreal take on the classic Western The Good, The Bad and The Ugly. Helps to have seen the original, but you'll get tons of laughs either way.

Also; Tony Takitani. A beautiful but bleak drama based on a short story by Haruki Murakami. I should warn you that it's very slow-paced; the dialogue is sparse, and the plot is quite minimal. But it's short enough and never drags on for too long. Highly recommended!