There are 9 types. Type 1 is the reformer or perfectionist, type 2 is the helper, type 3 is the achiever, type 4 is the artist or individualist, type 5 is the observer or investigator, type 6 is the questioner or skeptic, type 7 is the enthusiast or adventure, type 8 is the challenger, and type 9 is the mediator or peacemaker. Each one has a snake, or a darker side of its type.