I’m a firstborn, and I must say–I fit the bill. As I read about the characteristics of my birth order, it was like reading a creepy, accurate horiscope. Everything fit. This site from the University Of Maine gives some information on different birth orders, including ways to make your qualities work for you. It is a really cool read, and I bet it will make you want to learn more about the subject. I’ve always found it fascinating. Let me know if your description fits!