Actually, I have experience here.
One person is a young girl, 20 now. She is basically a spoiled brat. She met an only child of rich parents and is basically doing everything she can to stay aboard that ship. Nobody tells her no because she will throw a fit if you tell her no. When she is part of a group, the group has to do what she wants to do. I was nice to her for a while but I pretty much gave up just because she was just flat out [annoying].
Secondly, I had a roommate who most likely had SA. It was somewhat annoying having someone who wanted to go with you everywhere because he couldn't get his own friends.
Did I exhibit my SA around these people? Not really? Seeing how they acted has really helped me exhibit some more normal tendencies, but not as many as I could have.