One of my all-time favorite books. The day I finished it, I went out and got pigasus tattooed.
A (too) personal anecdote about the book: Cathy is obviously (and very effectively) one of the most loathsome characters I've ever read – it's difficult to even muster ambivalence about her, like you might with Henry Miller (as himself) in Tropic of... However, when she's discussing some nefarious bullshit, she says something to the effect of, "You have to wait for the opportunity to get what you want." And that has stuck with me as a truly, deeply, affirming directive in life. I absolutely, unequivocally do not believe in anything like "The Secret" or other woo-woo bullshit, but in my experience, having the patience to wait out the obstacles coming before you and whatever it is you desire has worked well.
Mind you, another literary moral everyone should learn in tandem is Something Wicked This Way Comes – the things we think we want are seldom what we think they are.