Having endured some very obnoxious, horrible tenants living in the suite below me, I am now very aware of every noise I hear. I date someone who lives in a townhouse, and he has noisy neighbours now as well - they blast their stero on the weekends. Of course, it bugs me when I am there. I already had a run in with his neighbours about it.
What is your noise level tolerance? I am afraid mine is not very high. I wince at the least bit of noise and have to hold myself back from saying anything to the person causing the noise. One of these days someone might just "let me have it" for snapping at them.