A few years ago, a friend of mine told me that "Mansfield Park" was her least favourite Jane Austen novel, because she thought Fanny Price an annoying, overly prissy, well-behaved and too timid character. Now that I've finally read it, my conclusion is that I don't share her opinion.
I thought that the story got quite lengthy sometimes, but Fanny was a rather balanced and reasonable character, disposing of a really good sense of judgement, power of observation and knowledge of human nature (as opposed to her spoilt, over-confident and ill-judging cousins).