MBTI is really just a way to categorize personality types and is descriptive, rather than scientific. However, it does seem fairly accurate and reflective of people's traits, strengths, and inclinations. I, therefore, believe that we can consider 'NFP' a real disposition that most likely has traceable neural correlates e.g. genes that affect neurotransmitter modulation and transmission. It seems likely that the vast majority of 'NFP'-type people are prone to turbulent inner experiences and infatuation.