Something (book, film, singer, actor, etc.), that isn't clear, if it is just 'good' or just 'bad'. People have a lot of opinions on that, and no one can without prejudice really say, what is the right opinion.
1.The state of being controversial. Of enjoying, even relishing, controversial topics. 2. A mental state in which one seeks out little known controversy and seeks to believe the "underdog" side of the debate.
Dan is researching the flat earth theory. He must enjoy controversity.