Successful sales people

You know who's annoying people who talk to the room! I know a few people like this who will have a conversation with me but are talking loud enough so the whole room can hear. Now, these are not just people who talk higher than the normal deciple level but people who need attention. I dont know why people feel the need to sell themselves. You can do that on facebook im sure. Perhaps they just figure it will maybe get someones attention across the room who will say, i couldnt help but over hear...
I also feel like these people lie to make conversations more interesting. I mean are these real people? Who are you if your conversations aren't real?