Disclaimer: I am NOT a certified typist, but have read up extensively on MBTI/JCF for several years.
Whenever I hear someone describe their use of Introverted/Extroverted Feeling (Fi /Fe) in terms on expressing emotions and feelings, I usually have to bite my tongue; part of me not wanting to be overly pedantic towards a newbie of MBTI, and the other part wishing for them to realize on their own that there is more to these two functions than just "expressing emotions".
Basically, Fi and Fe are about your values. Do you tend to derive them from societal norms and expectations, or do you prefer to rely on your own moral compass in most situations?
Fe tends to be more objective , choosing to go with the general mood of the group, often at the expense of setting aside personal feelings. Fi is capable of doing this, but the key thing here is Fe is MORE likely to do this. They typically prefer to engage in a group.
Fi tends to be more subjective; if they are not "feeling" the mood of the group, they'll most likely either see themselves out or speak up about their objections or why they just aren't meshing with everyone else. They typically prefer to engage one-on-one.
None of these is better than the other, for they all have their situations where they shine and when they make people cringe. Fe shines when one gathers a group together in unified agreement over a tough issue. It sparkles when it is able to guide someone in a way that helps them assimilate better to society. It leaves a bitter taste in the mouth, when it turns a crowd against a person/group of people in a malevolent purpose, oozing like slime. It is also quite abysmal when it comes to articulating emotions and identifying and naming specific emotions. Fi shines when someone takes a stand against the group that is in the wrong towards a person/group. It sparkles when it is able to assist someone in detangling and identifying their complex set of emotions. It becomes bitter when it lets its personal feelings get in the way of them/a group having a good time. It can be exasperating when one seems to constantly interject a conversation with their opinion, as if it is the only one that matters.
Lastly, it should be noted and emphasized that we all use both functions, but have a tendency to have a leaning towards one over the other. I hope that this has enhanced your understanding in some way, and I appreciate all thoughts/comments on this subject.
Thanks for reading!