I think I'm a narcissist
Is it a good or a bad thing to be a narcissist?
You can't really call it good or bad.
It's important to realize the qualities in yourself. If you think you are narcissistic then you should ask a professional for a medical diagnoses.
No I just want to know if I'm a narcissist or not.
Understanding how you are is really important. You can not improve yourself as a person if you do not have a basis for who you are to begin with. Having this understanding allows you to build up the parts where you may lack.