Lady Vengeance
Honestly shocked that this hasn’t permeated film discourse as much as other Korean heavyweights. The plot choices, thematic details, and Park’s signature flair create some of the most iconic moments I can remember. The movie is wild, with a tone that jumps back and forth from comedic to tragic (this is also a Park film so that is to be expected). Love the way this tackles revenge and the way it fits in with the rest of the Vengeance trilogy.
Also, three of the casting choices were pure genius!