1) Bad drivers. I recently moved to a new city for college and the drivers here are absolutely terrible. They drive so slow and it's crowded.
2) People who use the elevator to up or down one floor when they are fully capable of using the stairs not even 20ft away. Living in the dorms, here and my previous school, has shed light on this.
3) I am trying to think of the most polite way to say this -- but I can't. My last one is ghetto, trashy, ratchet chicks. Good lord, I don't even know where to begin. There seems to be an abundance of them at my school. Much different than back home.