For me, Fe demonstrative can be seen in the following ways- Being very emotionally expressive physically and verbally (unless I'm uncomfortable), having the ability to affect the emotional atmosphere around me without really trying to at all, being kind of, fluid and shifting (I guess this is may be just irrational though) in my temperament, style and the like, I guess maybe my silliness and goofiness could be related to it too, or just Ne, or the combination. Like you said, I also feel like I can read the emotional atmosphere pretty well, though it's not an area of focus. Maybe a SLI will chime in because I have no idea how they vary in their Fe PoLr in terms of this and I would like to know as well. Something I relate to in Gulenko's IEE-Ne description is that I sort of alternate between a state of melancholy and being excited lol. A lot of people relate IEE to what is actually ESE as well.