As I have noted ad nauseum (and as we've seen ad nauseum), stereotypes often raise their heads in the business/career world. We, being fanboys, fangirls, geeks, otaku, metalheads, what have you, can face some pretty annoying stereotypes in our professional lives. Dealing with it intelligently is a way to both keep our sanity – and we can always turn it around to our advantage.
One of the oddest cases of being stereotypes in the work world, from an interview to a client discussion, is when the people stereotyping us FIT the very stereotype they're inflicting on us. The person that jokes about you being a game geek themselves can repeat dialogue from Final Fantasy 7 verbatim (with voices). The person that jokes about your body piercings has enough metal in their body to make a toolkit. The person who snubs your taste in emo music listens to songs so depressing they're banned in several countries.
This is annoying. This is hypocritical.
THIS is a chance to engage in some stereotype-fu and turn the stereotyping to your advantage – by connecting with the person in a way that changes their views and relations to you.