1.crying out noisily; clamorous.
2.characterized by or uttered with vociferation: a vociferous manner of expression.
People have called me all manner of things down through the years, but taciturn wasn’t ever one of them. When something activates my attention, it is hard to be quiet. In heated conversation my voice rises, when I am especially excited I become emphatic, and when I laugh… well, none of it is muted.
I feel things deeply, and care about them passionately. I also tend to proclaim them (sometimes at length) usually with excessive volume. Now, sometimes this kind of force is both necessary and desirable; when in defense of the defenseless, when trying to win debate trophies, and at other crucial moments: 
She was vociferous in her objection to the reggae music he had chosen to play.
The rest of the time, it can be seen as an inability to exert self-control, or a general habit of agitation. I have tried to learn to both moderate and modulate my responses in company who may not appreciate my rousing defense of child-beatings and unequivocal denunciation of Jack Johnson as both contributor to and evidence of the precipitous decline of western civilization.
As much as I can be expected to, at any rate.