These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Ensemble Darkhorse: The French herald Montjoy, at least for fans of the Branagh production, especially for slashers, since he's the only one who treats Henry with anything resembling respect that isn't related to him or a peasant.
It helps that the actor, Christopher Ravenscroft, was one of the few people from the original stage production Branagh was in that joined the cast of the movie.
This was from the 1989 version and doubles as Awesome Music. Seriously, just listen to the BGM.
Older Than They Think: The phrase "the game's afoot", commonly associated with Sherlock Holmes, came from this play (in the "Once more unto the breach" speech).
Painful Rhyme: Unless there's an accent in which "charge" and "George" rhyme.
Seinfeld Is Unfunny: What Hamlet is to phrases that have become standards, this play is to war movie tropes. It can seem like all Shakespeare has done is string scenes from WWII movies together.