Why do I suggest something like smiling? Because people have told me in the past that I look unfriendly. I am very timid and reserved, as many INFx's are, and that is often misconstrued as being cold and rude. I began to make an effort to smile more, and it offsets the cold impression - I seem more approachable. I am not suggesting to go around with a smile plastered on your face like a moron, but be aware of your body language and facial expressions. They could be sending a message you don't intend to send.