Social reality and culture work a lot like improv comedy. We often don't know "who we are" or what's going on socially, but everyone unconsciously tries to establish expectations of one another. Understanding this dynamic can give you more freedom to change your role in social interactions.
I had an extremely nerdy friend group in college, which led to weird effects since we couldn't all be "the nerd". One of my friends still gets annoyed at the fact that she became the "jock" and the "sensible person", just because she was slightly less helpless at life than the rest of us. Her reaction seems to be something like, "I'm for real actually a nerd, why are you making me play this other role??"