The introverted/extroverted question is a tricky one. Usually I'll put that and the shy/outgoing, and hope they'll say if they want a quieter or more outgoing form. If they don't, then I look for other clues. Like if they say they like being with a small group of people, but hate being in large crowds/alone, I tend to go with animals that travel in small family packs. If they say they're introverted and mostly shy, then more a loner animal.

Kat//Hufflepuff