I thought exactly the same RoxiS.C. when I read them, the 4th was a terrible let down, though I did enjoy the first 3 overall.
Up until now I've stubbornly refused to read classic books, anything by Bronte, or Austen for example, but this coming year i'm going to try and expand my reading and hopefully read one, even if I dislike it in the end I can atleast say I tried it!
Other than that, Westerns are pretty much the only thing I flat out refuse to read, so not my type of thing. Don't really read old war type books either. Actually looking at this, it seems I just don't do anything old haha. I like more modern novels I guess!