I'm the only one I know IRL. No one has ever told me this, but I suspect that one of my negative traits is that I can come off like a know-it-all at certain times. Recently I realized this when I was replaying a certain conversation in my mind. I do not like know-it-alls and it bothers me a lot to think I was acting like one. Now that I realize this I am careful not to act in that way which I don't like and which can make others feel bad.
I have heard the martyr complaint about INFJs before on this site. It really hurts but I guess I will just silently bear it!!