So my question is whether you people noticed some pattern in the presentation of INFJs in their speech, tone, facial expressions, even the way they dress and their eyes and so on.
Well, since I am older and more experienced, you'd not be surprised that I would have noticed more idiosyncracies than others by now in myself and others. You would be correct:
Speech: Halted/truncated at times, mumbled, trailing, bouncing lyrically along at times, non sequitur...
Tone: Even, level, but changes depending on my current state emotionally
Facial Expressions: Tee Hee. Yep! I got 'em, and they match whatever I'm feeling to the max. I don't like to appear angry or sad, though I often do probably.
Eyes: They probably glow or radiant love, if not whatever emotion is around.
Honestly, I don't know how others put up with me, but I'm glad when they do. I think one thing I've noticed other INFJ's do (as well as myself) is to look away in thoughtful repose while attempting to understand something in conversation. I'm sure there are many other mannerisms best stated by others around me who can see them best. We get so entrained (falling in sync with that around us), involved emotionally, deeply connected, that we mirror that of those around us without realizing how it appears, I think.