I've finally found my type whereby the Filatova portraits and intertype relations work for me. It has been a difficult journey because I had to learn many behaviors more indigenous to my Dual and Activity partners just to survive.
I first started studying Socionics in the year 2000. I have benchmarked others' typings against studying celebrities in movies, interviews, biographies as well as studied the people I come into interaction with in daily life.
For all this study, I am perhaps more expert than most yet am open and humble enough to concede that some of my suggestions from a distance are more certain than others. I will try to focus on knowns here.
Just to give you an idea of how often mistypings occur, I have encountered the following:
An SEI who self tests as ILI or INXX (me)
A LII who self tests as LII
Another LII who self tests as EII
A SLI who self tests as ESI
An LSE who self tests as ILE
An ILI who self tests as IEI
Two ILEs who self test as ILE
An LSI who self tests as LIE
An LSI who self tests as LSI
Another LSI who self tests as XSI
And so on.
Yet, when one wades past the facades, false beliefs and forces the intertype relations - the foundation of Socionics - to clearly work, all of the ambiguities fade away across the board and at last one can know if they are self typing accurately or have had to adopt compensatory behaviors based on the lack of enough quality relationships in one's life which allow one to naturally be oneself.