Which type of person is typically seen as low-key and less stressed out?

Type B personality is characterized by a more relaxed and easy-going nature compared to other personality types. Individuals with this personality type tend to be less competitive, more patient, and more flexible in their approach to life. They typically experience less stress and do not rush through tasks, allowing them to maintain a calm demeanor. This contrasts with Type A personality, which is marked by high levels of stress, urgency, and a competitive spirit. Type C and Type D personalities are associated with different characteristics, such as behavioral traits related to emotional regulation and a tendency towards negative affectivity, which are not aligned with the low-key and less stressed attributes described in the question. Thus, Type B personality is the most accurate choice to embody these traits.