As keyboard-less devices such as tablets and smartphones become more important in daily life, searching and exploring documents has become an increasingly important task. Traditional document exploration interfaces require multiple keywords to be typed in, which is cumbersome and time-consuming using a touch-driven device. We present BigGo-an interface for exploration of documents using touch gestures. Our interface goes beyond common binary touch gestures as "like" or "dislike" the user is given a chance to not just provide binary feedback, but also explain why they like or dislike a certain document. Since the feedback is richer, it allows BinGo to provide a better recommendation of documents, and aid exploration of the documents. The ability to provide richer feedback improves the exploration experience and decreases the overall gesture cost for targeting the proper document set. User studies and the results show that BinGo outperforms binary gestural interfaces on recommendation quality while maintaining the usability on traditional like / dislike exploration mechanism on touch interfaces.