At first, they seem like the friendliest people in the world. They tend to be sociable, good conversationalists and have attractive personalities. However, with the passage of time you start to feel that the person becomes a bit of a burden: they talk too much and almost always about themselves. They tell you the same stories over and over again. They are the type of person who feels authorized to talk about any subject, although they don’t know anything about it. And nobody can get them to shut up.
After you talk to that kind of person, you feel like you have wasted your time. Because ultimately, it wasn’t a conversation. Instead, it was a sort of sparring match in a long monologue. That’s why it’s likely that when you find that person again, you’ll make up some excuse to avoid another chat.