You

Be careful of your actions. You never know when you are creating a memory - Ricki Lee Jones

It's the impression that you leave behind that will keep the memory of you alive in people's mind.

You physically come and go but your emotional expression sticks around for a while. 

Once you make a connection, you can no longer use the excuse of "they can't judge me because they don't know me". 

You may not be responsible for what people think of you and how they see you but ONCE you have had an interaction, you have a part to play in their perception of you.

Choose to act wisely.