Yes, Nelly makes for a fascinating pov character because she so obviously despises the protagonists. Plus, I get the sense she has her own unrequited thing going on with Cathy's older brother. And Lockwood is kind of a sick ticket when you get down to it. I love how casually he tells the story about how he fell in love with a woman, wooed her, and then lost all interest in her as soon as she noticed he existed. He has no idea how messed up that is.

Also, am I the only one who thinks Heathcliff might be Cathy's half-brother? Because I re-read the novel recently, and the possibility occurred to me. What kind of nineteenth century English gentleman brings home a non-white street urchin and treats him like a son unless it's his bastard child?