The Good, The Bad And The Unreadable

I was talking to a friend the other day and she asked me what qualities in a book make it so that I don't want to continue reading or so that I can hardly stand not to read. I thought that this was a good question, and after thinking about it I told her what I thought. Knowing what gives you reader's block or what qualities of a book you really like is helpful, particularly when the reading is required. My friend is doing a presentation for a writing organization she is part of and part of her presentation is what makes a book bad. So I thought that getting the feedback from some of the best and brightest members of the Class of 2011 couldn't hurt. What makes you want to put the book down and spend a ridiculous amount of time on facebook? What makes you finish a book in one day because it was just that good? I know that some of the books that we read last year had qualities that produce reader's block for me, such as not identifying who the speaker is often enough in dialogue. Your feedback would be much appreciated. Good luck getting your logs and vocab lists done by Friday if they're not done already :)