The writing is fine and it's plenty insightful. Lots of great quotes you can pull from it. At first I wasn't much captivated by the characters and the story, but they all grew on me and as it got closer the end the story really pulled me in. 
 Here are some of the interesting questions/ideas I believe Anne Bronte was asking her reader to ponder while reading the book: How much can we as human beings really be able to judge one another with the lack of knowledge and understanding we have of one another? Also, can people really change? 
 This book makes me think about the potential within us to make drastic changes in our life and in who we think we are. People can change, and do! This book causes me to think about the idea that one evil person can cause a world of pain and suffering to many people around them. We can never escape our own influence on those around us, for better or worse. 
 There's an idea that's discussed a little bit by the main character that puts a little bit of alcohol with the child's medicine in order to cause him to associate alcohol with a negative taste. Kind of an interesting thought and discussion that takes place with other characters judging her actions. What's the best way to keep our kids from developing habits that can destroy them? 
 I had the thought that this would be a great book for me to recommend to my daughter when I want to encourage her to keep her eyes open before choosing a husband. :-) 
 I also enjoyed and agreed whole heartedly with some of the thoughts that were stated concerning placing our God before our spouse in order to obtain the correct balance which would only edify our marriage! I believe this is a true eternal principle that makes for much happier marriages :-) 
 Good book, well worth the read! 
 Some good quotes: 
 "I will give my whole heart and soul to my Maker if I can,' I answered, 'and not one atom more of it to you than He allows. What are you, sir, that you should set yourself up as a god, and presume to dispute possession of my heart with Him to whom I owe all I have and all I am, every blessing I ever did or ever can enjoy - and yourself among the rest - if you are a blessing, which I am half inclined to doubt." 
 -- Anne Bronte, The Tenant of Wildfell Hall 
 "When I tell you not to marry without love, I do not advise you to marry for love alone: there are many, many other things to be considered. Keep both heart and hand in your own possession, till you see good reason to part with them; and if such an occasion should never present itself, comfort your mind with this reflection, that though in single life your joys may not be very many, your sorrows, at least, will not be more than you can bear. Marriage may change your circumstances for the better, but, in my private opinion, it is far more likely to produce a contrary result." 
 -- Anne Bronte, The Tenant of Wildfell Hall 
 'I will lead him by the hand, Mr. Markham, till he has strength to go alone; and I will clear as many stones from his path as I can, and teach him to avoid the rest - or walk firmly over them, as you say; - for when I have done my utmost, in the way of clearance, there will still be plenty left to exercise all the agility, steadiness, and circumspection he will ever have. - It is all very well to talk about noble resistance, and trials of virtue; but for fifty - or five hundred men that have yielded to temptation, show me one that has had virtue to resist. And why should I take it for granted that my son will be one in a thousand? - and not rather prepare for the worst, and suppose he will be like his - like the rest of mankind, unless I take care to prevent it?" 
 -- Anne Bronte, The Tenant of Wildfell Hall