I'm giving out blue candy... but only to people in costume! Send me a picture of a character in some kind of costume or cosplay. Link or directly showing (providing the image isn't huge) are equally fine, and official and fan art are both okay! If you are using fan art though, make sure to link the source of the image. 
29 satisfied trick-or-treaters so far! (That means 1 sketchpads!)

my haul: