One of the Professor's family members, many years ago, dubbed me the Wicked Witch of the West. I loved it, and that is my every year go-to costume. Dead easy, too. Black dress and my Special Hat and Gloves. The Professor points out every single year that Hallowe'en is a Druidic/Pagan/Christian festival and as Good Buddhists we should ignore the whole thing, so I won't get far with the absolutely great Fying Monkey idea, though we will be going to at least one party. He always goes as a professor. Maybe I can suggest one from Hogworts!