For me, I will 2 modes, 1 for personal and another one for work.
For Personal
When I'm in a group of 7 or 8 colleagues/friends asking where to eat, I usually just follow majority without much suggestion as I can eat most of the food.
While when I'm with my smaller group of friends/ family/ loved one I usually transparent I will voice out my concern, ideas, and feeling.
For Work
If in a meeting with more than 10 people I usually follow majority again. If I have question or concern on that topic or project I will personally talk to the person.
if in a meeting less than 5/6 person usually I will voice out.
So in the end - a big group I'm easier going while in a small group I will voice out.
Ah, interesting approach. I guess your objective is to help move the decision process along faster, eh?