When I smile or see others smiling, I generally feel happy and positive. Smiling is often associated with feelings of joy and contentment, and the act of smiling can actually release endorphins, which are chemicals that can improve mood and reduce stress.
Seeing others smile can also have a contagious effect, and it can be difficult not to smile in return when you see someone else smiling. This can create a positive feedback loop, with smiling and happiness reinforcing each other.
Overall, smiling and seeing others smile generally brings a sense of positivity and happiness into my life. It can lift my mood and make me feel more connected and positive about the world around me.