Yes, I have similar experiences to what you are describing. Generally I don't want to converse with people very often unless there is a topic I would like to discuss. I dislike social group conversations unless the group is people I know very well and it is five or fewer. I am not good at asking questions to keep a conversation flowing though I am very good at answering them with too much detail. Recently I had to stand in a line at the bank for half an hour and the elderly man who lined up behind me was a chatty extrovert. He struck up a conversation and I mainly nodded and grunted or made what I hope are appropriate sounds. In the course of half an hour I thought of one comment that included a question related to what he was talking about. I felt so proud of myself. The relief was huge when it was finally my turn with the bank teller.