A computer-implemented method is disclosed for determining, for comments associated with a content item, response likelihood scores indicating likelihood of a user responding to the comments, and presenting the comments to the user according to the determined response likelihood scores. A response likelihood score of the user responding to a comment is determined according to an emotion score associated with the comment and a user propensity of the user responding to comments with similar emotion scores for a topic of the content item. The comments associated with the content item are ranked based on the response likelihood scores associated with the comments. An arrangement of the comments can be determined based on the rankings of the comments, and the comments can be presented to the user according to the determined arrangement.