Do you have a personal symbol? A favorite or lucky number? What is it?

Have you ever noticed that you always want to be a certain number on a sports team? Instead of or next to your signature do you put a symbol? These are all personal symbols of your own! What inspired you to begin using this symbol? What does the symbol mean to you? Is it something you outgrow, or does it stick with you forever? Share them with everyone here on fluther!