DC loves people; she loves being with people, with her grandchildren, her friends, her kids; in fact, she is rarely without anyone around. Her best friend moved away last week, and she is practically inconsolable. She NEEDS people, and people love being with her. She is witty, interesting, talkative, given to telling stories of her and her family.
KL, on the other hand, likes being alone. Although she enjoys her family and friends, she also really likes being alone. She is not a weird loner, but a person who enjoys and appreciates solitude. It gives her time for her hobbies, reflection, peace. She is a quiet listener.
Both interesting and unique women; just different styles.
And, it works for them.