Character

“Personality can open doors, but only character can keep them open.“

Elmer G. Letterman 

The charm, first impression and nice smile will get you in the right job, right relationship. But your attitude, perception, integrity and character will either keep you or throw you out of a good deal.. 

While it is a great idea to always be yourself; it's also imperative that you hold back some and not give everything the first time or even at once! 

It's good to adjust your approach, depending on what you are going for (and then slowly expose who you are and how it can be beneficial to your season).

Basically be you, but give a little at a time :)