They say you do not get a second chance at a first impression.
I do not believe that to be true. I think every time you meet someone is a chance to set a first impression.
The first words out of your mouth.
The look on your face.
The energy you bring (or take).
Are you consistently one way or another or are you unpredictable?
All of this will build a picture as what to expect the next time you meet.