Halloween is not much of a thing here, but I used to take part in this Halloween combat class where you would dress up and the best costume was rewarded. I did a pretty wicked zombie/living dead costume with heavy Ring girl vibes one year, wish I could post a pic without revealing who I am.

Previously I've been in a very spooky vampire costume and a witch costume. Both pretty basic choices, but I always went all in with the makeup and opted out from using masks and such. Aiming for the most "natural" looking horror. Having long black hair has been a help every time.