What's your reaction when a stranger smiles at you?

allstarsdude
Please answer the question for both the following scenarios:

1) A stranger you saw for the first time smiles at you.

2) A stranger whom you see frequently (e. g. gym, bus stop etc.) smiles at you for the first time.

For some reason, I find that a lot of people tend to be dismissive of random smiles where I'm at. Maybe it's because of all the phony marketers and salesmen who ruin the meaning of a smile.
What's your reaction when a stranger smiles at you?
21 Opinion