Asiam neighbors that do not understand apartment living. My place has pretty thick walls - can't hear the neighbors below or side to side at all, even when they're throwing parties.
Asians upstairs have kids that literally stomp around the apartment all day running around. You can hear them going from room to room - even with headphones on playing dubstep. They jump up and down so hard you FEEL the thumping. This goes on from about 1pm - midnight. I go up and talk to the mom and she gives me the "OHHHHHHHHHhsorryso-ee so-ee so-ee soeesoeeeee" and shuts the door in my face. Went up another day, said "look, I understand it's not after 10 pm which is quiet hours here, but I'm trying to write an English paper right below you so I'd appreciate a little less stomping on the floor." She goes "oh, my friends just now came over sorry it's their kids." ....No bitch, it's not, it's been going on for 3 hours and it's a daily occurrence.