I recently finished reading the second novel in an extremely popular series. Despite my general boredom and in spite of my infuriation with the characters the entirety of both books, I decided to keep reading. Only a very small part of the decision was because I  genuinely wanted to know what comes next in the story. (I do have a problem with never DNFing that I need to get over.) But the majority of the decision was made because I feel compelled to read popular series and books.