uumlau mentioned as an example, seems more INTP-like. Sure, I enjoy a good discussion and will take someone to task if I think they are being factually or logically incorrect. My real passion, however, is focused on getting things done, on accomplishing things that are important to me. Yes, you might see me arguing with someone over the best way to do something, but often I simply step in and do it. Again, action: not passivity, or aggression, or even an argument over trivia. When observing INTJs, perception is quite often NOT reality.