It depends what the subject is. If it's something I'm interested in, and with someone I like/know, I can literally go on for hours, if it's something I'm not so interested in, then I probably won't.
I have terrible tendency to correct people as well, you do not want to sit next to me in English XD.
Also, in presentations, you can't get me to shut up, because it's all prepared, and I come across as very confident, and it's about something I like usually. .
Oh, and also in debates, can't get me to shut up, I have controversial opinions, and everyone has to adopt them. ROFL.
EMZ=]