Edgar Allan Poe

The first thing I question when I read a work of Edgar Allan Poe is what inspired him to create such stories full of supernatural components and ideas that go against society norms. Reading his biography I get a clue. At first I suspected that his military life might have been the main component to such dark stories, but then, upon reading that Poe's life is filled with sorrow, death of loved ones, and neglection, I realize that maybe it's not so much his military experience but his life that's filled with with ups and downs (mostly downs though). Poe lost his parents when he was just three and was taken to a rich tobacco man who neglected Poe in an indirect and strange way. He sent Poe to college with almost no money causing him to go into a major debt. He remarried without telling Poe and ,when the time of his death came, left Poe out of his will. To go along with such neglection Poe also lost his wife, step-mother, and brother. The depression that came with such tragic events can be seen in most, if not all, of  his work; such as the story of Ligeia. Ligeia is a story of a man deeply in love with a woman who later dies causing him to be depressed. He then moves and finds another woman, whom he doesn't feel as strongly about as Ligeia. This story strongly correlates with his own life when his first wife dies.
On a different note, is it just me or is there a sense of insanity in every work of Poe? It's rather inevitable for Poe to not become a bit insane. The amount of depression that must have accumulated over the years of such unfortunate events must have led Poe to experience some sort of insanity. Just a random thought to think about. :)