Quiet is Not Synonymous With Snobby, Mean, or Even Unlikable.
We tend to assume those who are outwardly friendly, to be just that. If someone seems nice, is outgoing and reasonably charismatic, well, then they must be both genuinely nice and likable. (Hint: plenty of people who “seem” nice and appear outwardly sociable as well as friendly, are not especially nice at heart. Thus, an outward presentation can be deceptive).