Type A vs Type C Personality: The Key Differences

Some people burst through life like a slammed door — competitive, wound tight, allergic to waiting rooms. Others go quiet, swallow their frustration, and keep the peace even when it costs them. Psychologists call these patterns Type A and Type C personality. Both were born from medical research, both shaped decades of thinking about stress and disease, and both remain widely misunderstood. This guide breaks down what separates them, where the science holds up, and where it doesn’t.