Esoteric - understood by or meant for only the select few who have special knowledge or interest.
If you describe something as esoteric, you mean it is known, understood, or appreciated by only a small number of people.
I had to look it up as it is a word that I have never come across before. My question is, could that not cover any specialized subject with regards to posting or will you just be looking at the type of content that you have put in the tags list above??? They all seem to be of a similar type of genre.
I understand that when people refer to esoteric, they generally mean out of the ordinary. Generally, it seems to cover what many people would consider weird and wonderful. I guess that's a pretty big category.