I don't know that I can add to what you wrote above, I think it's well put.
I will offer the following. I am very well liked and regarded highly by those who know me. Friendships are very special to me and I go out of my way to help those that I call dear. Like everyone else, I am human, and there have been times when I have screwed up, some of the small and some of them huge. The bottom line is though that I make right whatever wrong I might have done. The reason I think this is relevant to the topic at hand is the following age old adage:
ACTIONS SPEAK LOUDER THAN WORDS.
I am a man of action. Most ESTPs are. Although I often have alot to say about everything, when something needs to be done, I have the wherewithall and gumption to make it so. Why? Because I believe in doing the right things for the right reasons, and I also don't like my intentions to be questioned. The easiest way to lay such inquiries to rest is to point out your historical precedents, by calling attention to your actions that nullify any doubts about you. Life is not just about random acts of kindness, doing what you believe in, or setting an example because it is the right thing to do, it's about all of them, and I have found that when you consistetnly live as such, when the time comes for testimony of your character to be verified, it is very easy to do, and you do not have to utter a single word, and sometimes that says more than anything.
[GROUP 0:] Many do nothing, they let life happen around them.
[GROUP 1:] There are those that
can. (Some)
[GROUP 2:] There are those that
will. (Fewer)
[GROUP 3:] There are those that
can AND will. (Few and far between)
I've always been a member of GROUP 3. Just because SPs are capable of social interaction in a highly successful manner does not mean they are insincere. I call bullshit on that line of thought, I've never liked the tone of it actually, it is condescending.