All of us deal with marketing at some point or another in our work lives. Whether we are ourselves markets, or you work with your companies marketing department. Whatever the case may be, there is a specific idea behind marketers and how they should be personality wise. Like how you expect your salespeople to be able to talk to anyone, we have certain expectations for marketers and what they should be like for them to be effective at their job.
Everyone knows a narcissist or two or even three. They are everywhere.