I've read that narcissism is a spectrum. It's good to have healthy amounts of narcissism, it is only bad when you're on the wrong side of the spectrum.

For everyone in this thread freaking out about potentially being a narcissist, I highly recommend this book from a Harvard Medical School psychologist. Rethinking Narcissism: The Bad-and Surprising Good-About Feeling Special by Dr. Craig Malkin. Here's his test.

http://www.drcraigmalkin.com/the-narcissism-test