When I write, I am always told that my characters are my weak points, and I agree on that. This is probably because I mostly spend my time by myself, instead of being outside and socializing. I am just more comfortable that way. Is there any good ways to learn how to develop my characters? And while we are at it, what makes a good and strong character in fiction? Personally I love stories that has strong character interaction and character development, but I have trouble writing about them. Any tips?