Birds Of A Feather Flock Together; Those of similar taste congregate in groups.
Scientifically: Ornithologists explain this behavior as a 'safety in numbers' tactic to reduce their risk of predation.
Psychologically: We are creature who self-divide ourselves into cliches and categories and subcategories. We give ourselves labels and praise amongst those who fit our mold and we scowl at those who do not fit in and yet again, label them too. It is a tough world to live in when one must give in to conformity in order to gain status. We contemplate whether it is worth it. America was suppose to be the land of freedom and all about individuality, but you will find that beneath the surface, are hidden cookie-cutter traps and agendas of conformity whether subtle or blatantly obvious. Come as you are, do not give in to social pressure, on the other hand, do not try and seek for attention in extravagant ways either.
Just be, and be so content just being.