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.
Genius Bonus: In "The Masque of the Red Death". While most readers can probably tell that Prince Prospero's name is a ShakespeareShout-Out, comparatively few people probably noticed that the story's entire premise is a subtle Shakespeare Shout-Out as well: it was inspired by Caliban's line "The red plague rid you for learning me your language!" in Act I, Scene 2 of The Tempest.
Harsher in Hindsight: "The Masque of the Red Death" is about a particularly nasty disease that causes people to die in agony, sweating blood. This was and still is all very fine and creepy, standard for Poe. This plague's symptoms superficially match those of Ebola, which have been discovered more than a century after Poe's death.
No Such Thing as Bad Publicity: Griswold's attempt at ruining Poe's reputation after his death did absolutely nothing to Poe's popularity despite the wide acceptance of his outlandish claims. People were thrilled at the idea of reading the work of an 'evil' man.