But I would also like to add that I have often been complimented by my bosses on my ability to communicate technical concepts in very entertaining and understandable ways. At one recent interview, an HR representative from the firm told me that the only feedback she received that was better than the feedback about my technical skills was the feedback that I would "mesh instantly" with the team and they all enjoyed my sense of humor. Sadly, that role was only budgeted to pay around 50% of what I had earned previously and there was no way to compromise.
I have occasionally worked in situations where a manager disapproved of my proactive nature and I need to improve my communication skills in those situations. It is very reminiscent of the type of situation from a recent research paper [0] about how extraverted managers tend to suppress the talents of proactive, introverted subordinates.
Thus far, I feel my communication skills have been one of my strongest assets and strongest attractive features for potential employers. But I do agree that I (like anyone) need to continue to work on them.
[0] "Reversing The Extraverted Leadership Advantage: The Role of Employee Proactivity" (2011); Grant, Gino, and Hofmann < http://homepages.se.edu/cvonbergen/files/2013/01/Reversing-t... >