I think I would not judge you so easily because those people who remain quiet and humble are not the same all the time. They have many sides that are hidden from the others and their observing power is quite well and the most important thing is they can find out the weaknesses easily. In a word their next move is unpredictable as others know less about them. And you are one of those people with the midset.
No sir, they're usually not always quiet.
I believe you have a very surprising personality that many doesn't even know about... yet. Right?