Useful read indeed. Yes you are right in pointing that characters should be dynamic and developing, flat or round character is of no use in fiction because fiction is based on real life examples. We associate these characters with our life. You are very right in knowing of one's characters inside out with their weaknesses and strengths. Loved the saying,"Life is a journey, not a destination". Thank you for providing an opportunity to a layman like me to comment.
Thank you for commenting on what points were useful to you :)