What is the least happy personality type?

Those with ENFP, ESTJ and ENTJ personality types rated engagement as highly contributing to their well-being. INFJ, INTJ and ISTP types rated this as contributing the least to their happiness compared to the other MBTI personality types.

Are INTJs oblivious?

Although INTJs are classified as Thinking types, their dominant function is Intuition, or more specifically, Introverted Intuition (Ni). Onlookers sense that INTJs seem to “live in their own world.” Immersed in their own minds and interests, INTJs can be oblivious to social norms or other practical aspects of life.