I always remember voices.
If I admire someone, my brain creates a soundflle of their voice and I speak like they would, perfectly in my head emulating them.
however, it might be face as well. I'm a novice at micro expressions, but I look for them when people speak; probably because once you know about micro expressions and study them, you will trust no one.
so far it's been pretty interesting actually.
In case you guys don't know what a micro-expression is: http://en.wikipedia....Microexpression