I’m a definite introvert, but I get kind of frustrated when people think I’m “shy”, because being shy implies you want to talk to people but you’re too nervous to, for whatever reason. I just don’t want to talk to people, because most of them are jerks. Or I don’t know what to say, so I just lurk around awkwardly. But if I do have something to say, good luck stopping me!
(No seriously, I should be stopped most of the time. For my own good as well as everyone else’s.)