When I was younger, I think I rarely had a facial expression. However, someone I met demanded that I change that (when I was 20). Since that time, I have always been conscious of it and I would say that my expression is always incredibly clear. (For good and for bad).
_________________
--Nyx-- What an astonishing thing a book is. Across the millennia, an author is speaking clearly and silently inside your head, directly to you... Carl Sagan