Libra is an air sign and the sign most focused on relationships. This means they want to have a mental understanding of the people around them. Once Libra understands someone, they know how to take appropriate action in interacting with them.
Aries; being greeted by dogs when you walk into someone’s house, cardinals, hangovers, the way a person’s eyes light up when they speak about something with passion
Taurus; being emotional while drunk, friends you can go forever without talking to who will still be there, the smell of a coffee shop
Gemini; buying new books, water balloon fights, fresh tattoos, the feeling you get when a situation you were anxious for turns out better than expected