i had a similar thread to this about which type would be the best teacher. Seems to be some interest in the words that dont get through to people (quasi thread) so thought I would bring this up again.
Myself, probably a Te subtype Te type (ExTj or IxTp), Ti subtype IxTj. Ti subtype ENTp.. but not every time. Sometimes if they are too into their own worlds it is still hard to see what they are talking about. INFj also seem to be plainspoken, the ones that I have met.. but not all of them or most of them to me.
Those that seem to get what I am saying most often: ISFp, ISTp, Ne ENTp... ISTps when I talk about how I'm feeling about something.. not necessarily what I am talking about.
most difficult is ISFj (well, Olga) and no offense to her.. she is lovely.. just .. most likely the most confusing for me personally, strong Ni subtype INTp, maybe some ISTj.. not sure.. some Ne Subtype ENFp but ENFps.. its more I can't see where they are going then understanding the content of what they are saying.
People who don't understand me the most when I'm talking is probably ESFp, ENFp, ISTp, ENxj.