I wasn't sure about it but a few weeks ago the wife and I sat down and talked about all of the people that annoy each of us (both of us are pretty chill, if I may so say so myself, so the list was quite short - but both of us have a few people that drive us up the wall). We realized that, in each case, the thing that gets on our nerves about the person is some trait that we both are very conscious of in ourselves and try to change or improve.
So all of a sudden getting irritated by someone has a silver lining - it's just a little reminder about the things that we need to work harder on improving about ourselves.
I'm curious - have you found the same to be true in your experience?
Update: The wife claims that she came up with the idea long ago and I have just misappropriated it from her. The wife is always right.