I love secrets so much that I actually started a web site so that I could read them all the time -- http://www.five-secrets.com. It's fun to post yours and see if anyone can relate to your secrets... even the really weird ones!
Secrets can show how much you trust someone or how much someone trusts you. Knowing a bunch of people's secrets can make you feel like people can count on you. I also like them because I like knowing things that other people don't.