In most of the existing researches and practical e-commerce services for fashion coordinate recommendations, only one of various input methods of a user's preference has been adopted without enough arguments. Therefore, this paper conducts a deeper study on various input methods of a user's preference for personalized fashion coordinate recommendations, comprehensively by two kinds of questionnaire investigation: how well do you think that you have expressed your preference to a recommender system of fashion coordinates via an input method? and how well has a recommender system recommended fashion coordinates for you based on your preference expressed via an input method?.