Some SE users, including myself, like experiment with the data in the SE system, looking for patterns, visualizing trends and so on. The data explorer is a fantastic tool, which allows users with little (or no) knowledge of SQL to obtain desired information from the system, download it, present it graphically, etc.
That said, I do not think that SE developers should be charged with building data visualization into the site's user interface. Some of us like word clouds, some like pie charts, some like multi-colored 3D stacked columns and whatnot. Each of us can download the data, put into the favorite visualization software, and enjoy the result.
For example, I happen to be interested in Unanswered questions, so I find this chart more useful to me right now than any cloud: top 50 tags by the number of questions, with the unanswered in red.
Source: Unanswered Questions by Tag. Also ordered by the % of unanswered questions: