Impression management is a game of blunder. That is a big statement, but it is you at the night, in your bed, with a night lamp on, staring at the adjustant wall, who is everything you should be, at all times. Pure character.
You can be genuine as well as judgemental. But ultimately its your authenticity and its consistency, that depicts what you are. Character is a personal thing. Very personal. You build your own. And its true worth can be know just by you and not the person sitting beside.
So, look into the mirror; and improvise yourself, always.