You may not realize it, but I have a lot to say.
So, what do you want to talk about?
I'm actually pretty intelligent. If you take the time to get to know me you would like the way I think about things...
It is understandable wanting to speak your mind if you have a lot to say. As long as you are polite and don't expect people do all the listening, people will want to hear what you say.
Huh, are you actually saying I'm a big fat mouth that can't stop talking to others about my opinions?
No, I'm just saying it's a good idea to have a lot of intelligent and well-constructed thoughts to share around to widen the perspective of others. Just be sure to listen as much as you speak.