When I was on LinkedIn, I found a post that taught me about creative extroverts and creative introverts.
Creative extroverts are people who will boldly and confidently throw out ideas but may not have actually thought through the implications and potential results. Chances are they came up with the idea on the fly although I've read that some people who seem like extroverts are actually introverts in disguise.
Creative introverts are people who aren't inclined to draw attention to themselves but will think through their ideas much more carefully. Chances are they've been thinking about them for a long time but don't know how to convince people to examine their work.
Personally, I'm the latter. It's why I chose writing as my creative outlet. Drawing attention to myself is a necessity rather than a desire and I'm constantly wondering if I've said too much, too little, or if I just shouldn't have said anything.
Whoever came up with the concept is falling into the common trap of thinking introversion and extroversion are about being shy. It's actually about where your energy comes from and how you need to recharge after interactions. The book Quiet; The power of introverts in a world that won't shut up explains it all really well. It wasn't until I read that book that I learned I'm a sensitive extrovert.
This all said, I'd worry about anything that pigeonholes people, particularly anything that seems to paint one creative as thinking things through more than another. I mean, in this example, who wouldn't want to be seen as the latter?
I'm certainly not afraid to spitball ideas, though. It's a key part of the creative process and, even the most reserved person in the world will come out of their skin when it comes to what they are passionate about.
As ever, finding the space you are confident in is key, and good leaders spot where people shine. A professional director/producer who's getting the most from their team should be nurturing an environment where people's views are respected. I have seen it go the other way though and it almost always leads to poor results.