There is nothing wrong with you.
For many people diapers provide an extra comfort and security. It's like a soft, warm hug gently wrapped around your bottom. Some people like the crinkle noise. Some people like the extra padding and how it fills out around them. Some people like the extra warmth they provide. Some people like the restriction they feel when diapered. Some people like the security that if they leak a little it'll soak it in for them.
Don't worry so much about what makes you not fit into the mold you think of as normal. Normal does not exist. Normal is just something we create in our heads. You are perfectly fine.