The thing that always annoyed me in this show
The constant banging shut of Jerry's apartment door. If you've lived in adjoined places like that you'll have an idea of how vexing it can be. When people simply shove the door and let it close and latch by force, that impact goes through the walls and floors to everyone adjacent.
Ok it's a TV show and it's not really happening, but it always brought back the frustration with ignorant inconsiderate neighbors from the past. People who never considered how easy and civilized it is holding the knob, rotating it, easing the door to it's stop and releasing.