I hate loud neighbors. But I also am disappointed more apartments aren't built to be sound proof and that even if they are it's nearly impossible to find out if they actually are before moving in.

My good experience that told me this is possible is in 1999 I moved in to the my first apartment with a built in washer and dryer. When the agent showed me the apartment and pointed out the washer and dryer, I said something like "I guess I need to be sure not to use it too late so it won't annoy the neighbors". The agent said, "this building was originally built to be condos. Each outer wall is 6 inches of concrete with 6 inches of space between it and the next wall for the next unit. You can run the washer and dryer anytime you want, your neighbors won't hear it.

I've never been lucky enough to live in another apartment built that way. My current apartment, the neighbors are up stomping around the room and having loud conversations til 5am. I think they call family in Korea and so are up to match the time.

I haven't talked to them about it yet but I wish I just didn't have to and the apartment was designed better.