Do you see yourself the same way others see you?
Is it possible what you think is being quiet and confident might be perceived by others as aloof and arrogant? Is it possible when you try to use big words to sound intelligent others perceive you as being pretentious and overbearing?
If you keep an open mind, every once in awhile you will get a glimpse of the way others see you. The key is to take what they say and learn from it rather than arguing and disputing.
You might be surprised how differently others might see you as opposed to the way you see yourself.
Have a great day!