I am logged in so I might as well reply to you, even though I was planning to write on the thread tonight. I can explain my so-called 'pursuit of esoteric knowledge'. I probably mean mostly in terms of reading, although I have attended meetings and workshops by various groups. However, having read the thread I am sure if I am coming from the same angle as the poster, so not entirely sure if my interest is relevant to the thread.
My own understanding of the esoteric is based on spiritual traditions primarily. I first came across the idea when I was a practicing Christian, when I heard that there were different teachings taught to Jesus's disciples to the wider groups. This was when I was at school and I found a number of books on esoteric Christianity, although I would not be able to recall their titles now. Following disillusionment with some of the ideas I encountered in college Christian Unions, because the ideas seemed so fundamentalist, I began reading in areas of Eastern religion, theosophy and diverse areas. I still do so, and even frequent an esoteric bookshop in London.
However, I am not saying that I believe the ideas in a fixed or concrete way. Having read about theosophy, I am aware that Blavatsky's mediumship was fraud. I have also read a very eccentric writer, Benjamin Creme, and attended the final lecture he gave in his 90s, before he died. The most relevant ideas he voiced, relevant to this post, is the belief that there is a divine hierarchy of invisible masters.
I won't go on further, because I can imagine that the ideas which I am talking about are open to big questions. However, it is in this kind of context that I am familiar with the whole idea of the esoteric, and I am aware of esoteric aspects of Buddhism and many other traditions. So, that is the basic background of my understanding of the esoteric.
However, I am aware of the whole way in which knowledge structures change. I am not sure that the idea of the esoteric writers is considered as being of much importance today. They are mostly in little corners of many bookshops, labelled as new age, and perhaps we have gone past hope of a new age now, as we are in a fragmented world.
The one other aspect of the esoteric which I am aware of is that often within such forms of thought, one aspect of the reason why it is considered as esoteric is because the knowledge is considered as being potentially dangerous, and thereby, reserved for the initiates.