People around the world share content on social media at unprecedented levels, with over 720,000 hours of video uploaded to YouTube, 100 million photos and videos posted to Instagram, and 500 million tweets sent each day. In order to make sense of this massive amount of content, we survey social media users in the United States, Italy, Germany, Japan, and Korea about the kinds of content that they like and dislike. From these open responses, we develop a list of the most prominent genres of social media content and compare the responses according to the country, gender, and age of users.