I feel like I'm over-sensitive to sounds and noises. I can hear someone's Facebook message ding over my noise-canceling headphones while listening to music, and it bugs me. Not sure how I get affected productivity-wise, but I am definitely more prone to lashing out at people or sending angry emails when there are too many of these things.

Also, if you have your sound turn on, are in an open-space office, you keep messaging someone and your messenger keeps making loud sounds, that's incredibly rude and I think very poorly of you.