Studies suggest that friends having dislikes in common is just as important– if not more important– than having likes in common. I don’t remember where I read this, but I read it just this weekend.
Possibly in the same place I heard about the LibraryThing UnSuggester, which given a book you did enjoy tells you what books you should not read. For example, if you liked the Critique of Pure Reason, LibraryThing suggests that you avoid Confessions of a Shopaholic.
Although I have to say it strikes me that The Devil Wears Prada probably has a lot more in common with Hayek’s The Road to Serfdom than fans of either book would be willing to admit.