Aries: Winning is what makes an Aries smile, especially when you are someone who is just better at the thing you're winning. Aries love to win and it always makes them smile, especially when it's not a given that they will win.
Taurus: If you want to make a Taurus smile, indulge them. They love being pampered, cuddled, and fed. Treat a Taurus like royalty and their smile will be blinding.
Gemini: Geminis tend to smile a lot anyway, but if they're feeling a bit down, being around friends and connecting with someone one on one will make them happy. Actually, seeing someone else smiling will make Gemini smile.
Cancer: Cancers smile when they're with their family or when they're doing home improvements as they tend to be very house proud. They also love being out in nature and hearing live music. There's something about music that feeds Cancer's soul and makes them so happy that it shows on their face.
Leo: The easy answer to what makes Leo smile is shopping and buying the perfect gifts for their friends and family. However, if you want to go a little deeper, it's when people are very happy to see them.
Virgo: Virgos smile when they find the solution to a problem that no one else could figure out or when they succeed at something where other people expected them to fail. Virgos like proving themselves and showing other people that it's not a good idea to underestimate them.
Libra: Libras smile when they're the center of attention (in a good way) at an event. They smile when they witness people treating each other with respect and kindness for they secretly wish that everyone everywhere would just get along in peace and harmony.
Scorpio: Good intimacy makes Scorpio smile, but even more so than that is the feeling that they're understood and appreciated. When Scorpio is feeling overwhelmed by their life, if they just go outside or go to a planetarium, they'll feel much better after star-gazing.
Sagittarius: Sagittarius tend to smile often because they're very excited about life and the adventures that it offers. When Sagittarius is feeling low, if they make plans to go somewhere, they'll start to smile. They're naturally very friendly, so smiling comes easily to them and helps to give them their positive attitude.
Capricorn: When Capricorn accomplishes something and they're recognized for their achievements, it makes them smile. Even more than getting prizes and honors, if Capricorn is able to pay it forward and mentor someone, that makes them happy.
Aquarius: Figuring out a new piece of tech or creating something useful makes Aquarius smile. While music may feed their soul, Aquarians love to go off alone and experience nature.
Pisces: Reading a book so compelling that they can't put it down, or listening to new music repeatedly, or creating something beautiful makes Pisces smile. They love connecting with people, even if they're fictional people. Pisces love going to the movies, getting their snacks, and losing themselves in the story.