What personality trait in people raises a red flag with you?

I dislike superficial people. Should a person flash a phony smile, enthusiastically shake every man’s hand, and compliment every woman in the room, it raises red flags for me. An honest person can’t maintain that level of energy.

I am much more comfortable with friendly, down-to-earth people who don’t have something to sell. I love sincerity, a good story, and an honest smile.