Can SOMEBODY please explain...

I am currently caught in a conundrum...to paraphrase Shakespeare "To speak, or not to speak...That is the question". I have often been chided for my periods of silence, I guess because it makes people feel uncomfortable when they don't know what's goin on in my head. I have been frequently deemed as Evil, Unsocial, Mean, Aloof, etc...because at times I have chosen to be silent versus misunderstood. But just as Libras need balance, I often have times where I am very chatty and extremely talkative. However, it is during these spans I have been characterized as having a "slick" mouth! I will admit, I am smart...very smart and I do AT TIMES disguise humor, cajoling, and sarcasm with my adept handle of the English vernacular (see what I mean, lol) but this isn't always the case. So which one is it...do people want me to be quiet or speak my mind??? Cause clearly you can't have it both ways...