The Antic Hamlet
Frenetic, manic and charged, Gibson's Hamlet is by far the most believably insane. Although he never comes off as clever as Kenneth Branagh, or indecisive as Ethan Hawke, Gibson is thoroughly tormented as Hamlet, making him my favorite.
Grimly set in a dirty old castle, this version best plays on the themes of corruption and decay. It's the earthiest version, the one with the breath of the plague upon it.
Scenes are mixed around, significantly out of order, but the abridgement all-in-all is for the best.