"As an actress, it appeals to me because I love the idea of playing those in-between moments, the sort of behavioral stuff that one might not normally see"

Julia Louis-Dreyfus is expressing her appreciation for the opportunity to play characters that are not always the most obvious or typical. She is drawn to the concept of playing characters that remain in between moments, or those moments that are not always seen. She is describing the subtle nuances of behavior that can be checked out through acting, and how these minutes can be utilized to develop a more reasonable and complex character. She is expressing her appreciation for the chance to explore these moments and to bring them to life on the screen. She is also revealing her appreciation for the challenge of playing characters that are not always the most apparent or common. By playing these characters, she is able to bring a special perspective to the function and to produce a more interesting and dynamic character.