What makes people want to talk to some people and not others?

Some people are just naturally more magnetic than others, even though they don't say much. Why is that? As in acquaintances, colleagues, friends, and roommates. Do people just start talking to you even though you don't say much? or do you know people with this luck?

What makes people want to talk to some people and not others?
What makes people want to talk to some people and not others?
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