It depends on the person, some people, maybe wisely, don't reveal all of themselves and then there are those, as illustrated in another thread, give way too much information and the sort of stuff you don't really want to hear. I remember years ago one mother at the school gates, telling me within a few minutes of an introductory chat, had launched into how her husband had simultaneously fathered a child by another woman when they were expecting theirs. Then she went on to talk about her business, she was an aromatherapist and how her clients simply begged her for lifestyle tips as they so admired her appearance, all this from someone I hardly knew
I've been right and I've been wrong about people I took a dislike to the wife of a friend when I met her over 35 years ago, found her quite loud and dictatorial, when I got to know her better realised that she is in fact a very nice person quite kind and caring and very entertaining, the dictatorial part is still there but I now tend to think of that as positivity!