As human beings we are constantly giving and receiving messages in our facial expressions, body language, tone of voice, inflection, choice if words.
We can express pleasure, joy, pride, disappointment, annoyance, anger, disgust, love, hate, etc.
As we parent we need to be just as careful of our unspoken messages as our spoken ones. Both have power.
While it is good to express feelings to our children, don't over do it, limit the severity. Our children feel emotions in a huge overwhelming way, they don't need the added burden of our emotions on top of it.