Aries: overhearing something interesting/funny a stranger said
Taurus: seeing two people hug
GEMINI: two best friends laughing
Cancer: kids/babies smiling at you
Leo: a cute family taking selfies together
Virgo: seeing good representation on billboards/ads
Libra: when a stranger compliments you
Scorpio: tipping street/subway musicians
Sagittarius: when someone offers you a seat on the subway/bus/train
Capricorn: when a stranger takes another person or your check for a meal
Aquarius: seeing someone smiling at their phone in public
Pisces: old couples holding hands