Archie was the same, he is very outgoing now though unless people invade his personal space without his intiating it, then he runs straight back to me sooking. I too believe that its just their personalities and its not at all a bad thing. i have had numerous family and friends tell me that i am making a rod for my back by comforting him when he feels insecure, that is ridiculous! Your bub will get more outgoing as she gets older, for now just appreciate how much she adores and loves you.