Hrrm.... Now that I think about it, I use facial expressions very heavily rather than gestures with my hands. Someone once told me that they could have an entire conversation with me without me ever having to say a word.
Anything that you haven't fought for isn't going to be appreciated. It takes blood, sweat, and a large amount of tears before you appreciate what you have.
Most of the ISFJs I know also have extreem facial expressions, but more so on the hand movements... But I agree with what someone said earlier. I think it may be the Si and Fe combination that really makes this type do this.