All the functions have a distinct look to them.
The face usually looks stern. The face gives the appearance of someone that is very "together" or organized. Sometimes sarcastic.
The face is gives the appearance that the person is very chaotic. It looks as if the person is very unstable or disjunctive.
-Fe/+Fi Very reserved facial expression, looks as if the person just wants be to him/herself. In periods of anger, facial expression is very expressive.
+Fe/-Fi Gives sort of a happy go lucky appearance. Very talkative, not shy. Likes to play jokes. Often likes to distance self from people.
+Se/-Si Very down to earth. Realists. Usually fits in. Usually settled in. Routine lifestyle.
-Se/+Si Likes to stir the pot. Usually very aggressive. Impulsive, does things on a whim.
+Ni/-Ne Usually place strict moral standards on themselves. Usually have a strong need to fit in.
-Ni/+Ne Has a dreamy appearance, very intuitive like face expression. Very rebellious. Lacks will to get out and do things at times. Usually does things impulsively when they do.