We love seeing examples of people expressing their passion, especially when it reinforces their desire to do well for their clients or colleagues. Passion is contagious and can even lift others out of lethargy.
There is a distinction, however, between expressing passion and being subjectively emotional, or “overly emotional” as some people describe it. When this happens, people lose their objectivity and they are less effective influencers. I’ve seen many examples of this, with both positive and negative emotions.