Namely, the reasons why they are famous, especially what they do. Taylor Swift sings horrible songs people seem to think are about love but are really about creepy stalkers leering at their well-adjusted, successful peers from the bleachers, or children trying to get married so they can start fornicating. I don't care about her personality or image, I care about having to listen to her "music." I think Barack Obama might be a nice guy, but I dislike the way he executes the duties of his office. Ditto for John McCain, except for the nice guy part, and add in a dose of curmudgeon.

I would have put Frank & Jamie McCourt on the list, for example, except I know of no one who likes them, and apparently they don't like each other.