I'm reading The Finkler Question at the moment and I don't like any of them. But I'm still reading because the writing's good and (mainly) because I want to get the end of the story.
The two other similar books I can think of like this were A Prayer for Owen Meany and (though I didn't think it was particularly well-written) White Teeth.
I like to like at least one character in a story. Am I unusual? I'm not a great reader so maybe you more voracious types have a different view.