Even though my parents nowadays are a bit like, "you're far too old for trick-or-treating now Shurtle," I'm still definitely interested in what you personally come up with.
If I have the right makeup that won't give me an allergic reaction, I think I'd quite fancy dressing up as a wendigo from Until Dawn, or Shelob from The Lord of the Rings.
My friend is really into SFX makeup, so we might even collaborate and turn me into a xenomorph with the correct equipment and stuffles. I look forward to seeing all of my neighbourhood doing a little Halloween carnival/fashion show, running around in all of their little outfits and collecting chocolate apples. ^^