Poe believes that life will always be accompanied by sorrow despite one's best efforts to avoid it. In other words, love and sorrow are complementary and interpenetrating, since where there is peace, despair looms. As an example, the "The Masque of the Red Death" has a gaudy masquerade interrupted by the sudden appearance of death in overly macabre clothing.
It is common for Poe's characters to have contradictory feelings and aspirations. As a result, Poe's stories are largely psychological rather than metaphysical. It is best illustrated in the ending of "Ligeia", which depicts the protagonist's opium-induced hallucination of his dead wife alternating with the corpse of his new wife. Here we are exposed to a flux of feelings for his long-gone wife, along with conflicting feelings for his new deceased wife that he does not truly love.
His famous "The Black Cat" also conveys the inner turmoil of man in dealing with his vices. In this story, the male protagonist is described as being friendly towards animals at the beginning of his life. However, after he married his wife, who is also an animal lover, he begins to drink and abuse his pets as a result of intemperate outbursts. This results in him gouging out a beloved cat's eye and eventually killing and walling up his wife. Throughout the story, Poe weaves guilt, hatred, and revenge together in a complex way.
Poe's "Manuscript in a Bottle" and "The Man of the Crowd" may have greatly influenced both Ligotti and Lovecraft. In both stories, humans engage in mundane routines and automated tasks to avoid facing their mortality. There is a great deal of symbolic depth in these stories. In these stories, mankind engages in many psychological tricks and nonsense (including revelries) to avoid confronting the "Conqueror Worm", a reference to Poe's famous poem. The setting to many of his stories, like "The Fall of the House of Usher", may also reflect the deteriorating mental state of the main characters.
Poe was an extremely versatile writer. It is said that he wrote the first detective story, "The Murders in Rue Morgan", as well as adventure stories like "The Gold Bug". There is a subtly sinister aura to his stories, which beautifully describes the surroundings.
There are several tropes in Poe's writing: revenge that is sometimes justified (e.g., "Hop-Frog"), similes and analogies to sepulchers that remind us of death's inevitable occurrence (e.g., "The Premature Burial"), the complicated relationship between guilt, hatred, and revenge (e.g., "The Tell Tale Heart"), beautiful women who die due to disease and leave their spouses in despair (e.g., "House of Usher" and "Ligeia"), etc.
Top three favorite stories: “The Fall of the House of Usher”, "The Masque of the Red Death", and “The Man of the Crowd”.
Top three poems: "A Dream within a Dream", "The Conqueror Worm", "The Raven"