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.
YMMV: Glengarry Glen Ross
Alternate Character Interpretation / Fridge Brilliance: Blake is a phony, which would explain why he refuses to tell his name to the salesmen when he berates them with his speech, instead identifying himself by his car, his watch and how much money he supposedly makes as a salesman. He's an actor/motivational speaker hired by Mitch & Murray who can't allow to be researched by the salesmen and discovered.
Crosses the Line Twice: The constant berating is nothing if not unique, which makes some of the insults stinging and hilarious, such as Roma's disdain for an Indian client, stating that he was so stubborn, not even the Indian gods could get him to sign a deal.
Misaimed Fandom: Not only is the film loved by the very Salesmen it sets out to destroy, but Blake's scene (which is intended as characterizing pretty much everything wrong with corporate America) is used as a motivational tool in workplaces. Of particular note is a Cracked.com article (see Memetic Mutation above) where the author pretty much uses the scene to describe how one might become a "better person", when David Mamet has openly said he intended that scene to show what was wrong with rampant capitalism and cutthroat sales tactics.
One-Scene Wonder: Blake's scene in which he completely berates the office staff for their failure to perform. Especially notable as it's original to the film adaptation.