Every one of us is different. I know this from experiences and observations. Most of the times, stereotype clustering is the only way that makes it possible for us to categorize each other, although there are few categories at all, depending on how someone perceives it. Like when you say self-absorbed, do you really think everyone (people who think and know they're pansexual) is like that? The way you put it suggests so. You might want to think about possibilities first before pointing out uncertain specificity.