Sorry, I'm too out of the loop with WOTCs new monster manuals, so I didn't include them.
Pick 1 only...I know its hard.
Mine: The Troll. This guy just "was" AD&D to me. Intellegent, humanoid but also monsterous and almost magical (in its regeneration ability) and being a fungus! The image of the troll putting out string (in the DMG or PH?) to lure and trick the underground adventurers...that really summed up the game for me.
Pick 1 only...I know its hard.
Mine: The Troll. This guy just "was" AD&D to me. Intellegent, humanoid but also monsterous and almost magical (in its regeneration ability) and being a fungus! The image of the troll putting out string (in the DMG or PH?) to lure and trick the underground adventurers...that really summed up the game for me.