If I were to film this novel, I'd put more of an emphasis on Christine, because she could be made a much more interesting heroine than she typically is. Usually, she's just Pearl Pureheart, fainting and screaming and drooping about in a white gown. But in the book, she's more active, and becomes almost a sort of partner with the Phantom, though not a very willing partner. They understand each other very well, maybe because she also had an uprooted childhood, and had to fend for herself from an early age. Anyway, she's not a mere victim. I don't know just what I'd do with Raoul de Chagny, though; you can't do without him, but there's not much to him. Maybe the book was smart to just leave his and Christine's fate to surmise, because though she obviously can't end up with the Phantom, Raoul is so pallid in comparison, it's hard to think of the two of them equalling a "happy ending".
Now I'm reading the "Gormenghast" trilogy. I remember trying and failing to read it a long time ago; I think I was just too young. I've heard good things about these books, and hopefully I won't be repeating the Philip Pullman disappointment of last year.