The combination `脾气 (píqi)` literally translates to “spleen energy,” which evolved to mean “temperament” or “disposition.” Adding `好 (hǎo)` directly creates the meaning “good temperament.”
In Chinese culture, which heavily values social harmony (和谐, héxié), being `脾气好` is one of the highest compliments you can give someone regarding their character. It signifies self-control, maturity, and consideration for others. A useful Western contrast is the value placed on being “assertive” or “passionate.” While these traits can be positive in the West, frequent displays of strong emotion, especially anger or frustration, can be seen in Chinese culture as a loss of control and a disruption to group harmony. A person who is `脾气好` is seen as a pillar of stability in social situations. They don't make others “walk on eggshells.” This trait is especially sought after in relationships and work environments. In dating, a partner with a `脾气好` is considered reliable and safe. In a team, a colleague who is `脾气好` is seen as cooperative and easy to work with, contributing to a positive and productive atmosphere. It's less about being passive and more about being gracefully composed.
`脾气好` is a common, everyday phrase used in informal and semi-formal contexts.