I have always felt that being a lefty has always been a special quality of mine. Not only do I have a strong left hand but also I have become "ambidextrous "as well. Since the majority of manually created things is for the right handed person and the majority of people in my life are right handed, that I had to learn manual activities from, I have learned to use both hands.
The concern of the question here is: what makes being left handed unique? Being able to have physical strength on the left side of the body gives me an advantage in certain activities, such as sports, manual activities in my profession (I am a nurse) and playing musical instruments( guitar and piano).
OH- FYI- My son is a left handed and both his parents are left handed. I think that is special and unique.