A few times in my career I have been rubbed over MBTI training on Personality Types, and then at Cisco, I tried to confound the Instructor with Sigma 4Cr for the 4 Vedic VaRNaa Classes. But I did not find these things very sticking and having much practical values.
Then while talking to High School Friends, I found an interesting pattern and related to Kundalini Awakening Phenomenon, which I underwent 3-4 years back over time. Only experiencing and surviving it would make one realize what a potent force it is. It is Science's Dark Energy, Chinese Chi and Vedic PraaNaa (which was the basis for Indian Kalaari where warriors could touch a "chakraa" or a nervous plexus and kill people, and banned by Britishers as they could not comprehend this power, but taken up by the Shaolin Monks from an Indian Monk called Buddhi Raja).
There are 7 Major Nervous Plexus, a.k.a. Chakras, along the spine, and many minor ones. They are the hubs where the efferent and afferent nerves meet up. One can read on Internet but they are Mooldhaara (Sacral), Swaadishtha (Genital), Agni (Solar), AnanthakaraN (Heart), Visuddh (Throat), and Shasaara (Brain's Pineal/Pitutatry Axis). One day I will go deep into the subject in this blog.
In one of the Upnishads, the evolution of man is extoled towards virtuousness. One's own evolution towards this path is where one center of consciousness resides. So depending on where one's consciousness is, that subject belonging to the Chakra would like to be stimulated.
And sometimes the external energy can stimulate these chakras to phenomenon beyond most of the people experiences. Just imagine these Chakras start behaving like individual Hearts - and sometimes they defy the logic of Science and Material Beings. But now there is a lot of evidence to respect this phenomenon and Medical Science does acknowledge this but without any explanation.
What I found, that the "Fart Topics/Jokes" would appeal everyone. Then "Sex Jokes/Topic" would appeal most people. Then "Food Topics" would appeal to lesser people and "Emotional Topics" would appeal further less people. Then the Music, Songs and Arts topic would appeal to a very few - and the rarest of rare people, would only be excited with the Knowledge World.
In the Knowledge Path, there is still an evolution to be followed to cross the Body, Mind, Intellect and Ego Sheaths. It is very much the onion reflecting the evolution of the Sympathetic Stem, the Limbic System, and the Cortex but in reverse.