Tomorrow is officially Hellboy Day, when comic book retailers around the world will be celebrating 20 years of Red’s arrival on the comic book scene for the first time. There have been a variety of promotions on various web sites in the lead-up to this event, and today Multiversity Comics has published a piece called Creators Share Their Favorite Hellboy Stories After 20 Years. It includes my picks – and I say plural because it was pretty impossible to narrow it down to one, even though I looked exclusively at Hellboy titles, and didn’t include any of the B.P.R.D., Abe Sapien, Lobster Johnson, or Witchfinder stories… One of the great…