It is important, yes. Very. Its the cause and effect thing. Most people are in the habit of creating a caricature of you, despite you. Sometimes those caricatures are almost a character assasination. A big part of that is lac of perception, impatience, and disinterest, and self interest. So how they percieve you is almost like a kindergarden level dot-to-dot. Those types of people are many. In the professional world, your character (as seen by others), is pretty imperative. A bad image can sabotage your advancement, or likewise the opposite. They're not going to draw you accurately anyway, so you might as well manipulate the situation. Because you can. Honor your true self, with people who are capable of appreciating you. The beauty of being a INFJ, is the ability to camouflage yourself into a particular persona (albeit, energetically, for a short period), but you can effectively improve your reputation if you reflect a persona that is condusive to the setting you are trying to excel in. To accentuate my case, read How to Win Friends and Influence people.