Since I'm a gamer, the very first kind of data I came up with is the data of best selling game according to genres. So I googled a report from ESA(Entertainment Software Association) called "ESSENTIAL FACTS ABOUT THE COMPUTER AND VIDEO GAME INDUSTRY". Then I selected a set of data from the report which is about the best-selling video game in 2013, sorted by genres. Then I also searched a lot of photos that can represent each genre and used them in my video presentation.
There weren't much choice to make to make an audio representation: I can either use different pitch or use the same piece of audio but different volume. In my case, the data I choose is not primary for comparison, so different pitch can't effectively present the data and thus I use different dB to present the data. I find an applause sound effect and, for each genre of the game in the chosen data, I adjust the audio by reseting it's audio gain to the number shown in the data. Since the difference of loudness is hard to detect by ear, it's a good way to lie about the data by using audio.
As for the challenges I encountered,since I don't want to make a video just to present the data, I explored a lot of animation effects in Premiere Pro and I watched a lot of tutoring video to learn how to use them and this takes me a lot of time. But the process to explore those effects is pretty exciting.