I can be really interesting when I first meet a few people, because I don't really expect to see them again (loosens my inhibitions.) I can hog the center of the conversation, and entertain a group of people for a whole evening. Then the next time I see these people, I turn out to actually be a really "boring" person. That's when I become socially anxious and reserved, when I think that people are expecting me to be somebody I'm really not. I think If I make the tiniest mistake, new friends and acquaintances will not like me anymore. I simply wait and listen to the conversation until I have the chance to throw in a quick one liner or some interesting fact.