"bad temper" and "good temper" are certainly commonly used expressions in English to describe a person's temperament. However, there are also many other words and phrases that can be used to describe someone's personality and temperament, such as "easygoing", "irritable", "calm", "nervous", "moody", and "level-headed", among others. The choice of words used to describe someone's temperament may depend on the speaker's region, cultural background, or personal style.