This is not so much a thread about what attracted you to Socionics, but rather what seems to be your particular sub-field of interest within Socionics that you enjoy either learning about or developing? Hitta has the +/- thing going on for him, and TC developed the dual-type theory. Jonathan seems to be snug on misconceptions of Ne vs. Ni (and creativity). And Expat seeks to expand the understanding of the basic 8 functions and 4 Quadras. I know I am generalizing a bit here, but I am trying just to give a basic idea of what I am trying to talk about here. But to give you a more developed idea, I will share mine.
For me the aspect of Socionics which has my attention deals primarily with the behaviors that people exhibit in regards to type, quadra, and function identification. (Why do people personify functions? Does behavior change with a change in type identification? Do type labels affect the perception of the content and individual? etc.) This most likely stemmed as an extension of my interest in political science in the behaviors which people exhibit towards party and issues identification. So while I do have a great deal of interest in expanding my knowledge of the functions, types, and quadras, I also try and be attentive to not just the content of Socionics, but how people talk about it as well as why this may be the case. I think that this is perhaps a neglected aspect of the dynamics of Socionics.