What is the surprising matter about yourself that are not known by many people?

People doesn't know that I am a very talkative person. I like telling stories about my childhood and anything under the sun. I can go on and on telling story especially when the one listening to me is interested on my stories. Usually people think I am a snob but what they don't know is that I am a very shy person. But once I get to know the person, I'll be the most talkative person in their lives.