Introverts do get a raw deal in the workplace. Over the years I've frequently found myself talked over and discounted by loud mouth extroverts who have little value to add. Standing up for yourself and asserting your opinions somewhat forcefully but politely is a good way to put over enthusiastic extroverts in their place, because they don't expect it and they suddenly realise that extroversion can also be a weakness.
On another point - blogging is great for introverts ;-)