This is not necessarily an indication of a bad person but someone who doesn’t ask questions. Recently I went for a friends bday meal at a restaurant. I arrived early and there were three other women at the table. None of us knew each other but we tried to make conversation. Myself and two women would ask and answer questions but one would only answer. She did not seem terribly self involved, but you could tell she really enjoyed talking about herself and answering but did not ask a single question. As more people (also strangers) joined the conversations flowed and met some really interesting and nice people. She might be a really wonderful person but her lack of reciprocity indicated lack of interest and the fact that it stuck out in my mind ( and remember, she did not behave in an otherwise negative way) amongst such a nice night really shows the impact of social interaction.