When you create a page, Facebook allows you to specify the "type" of page. Some of the most common are pages about movies, TV shows, and books.
Using the half a million pages
has data on, I found that not only are "interest" pages the most common type, on average they're also the most liked. They're so far above the average in fans that they dwarf every other type. See the chart below? The giant line on the left is interest pages.
In the graph below I compared the most-liked pages to the average number of fans Facebook pages in our data set have (624). What you see there is those types that have more fans than the average. I had to remove interest pages so you could actually see the rest of the lines.