New Moon is my sister's favorite of the three. She's read it twice already, and I only just brought it back to her in mid-December, when I went to China. I think the star-crossed lovers thing has something to do with it; my sister will deny it, but she's a hopeless romantic underneath all her layers of teenage cynicism.
Me? I missed Edward in this one for the most part. And -- and maybe this is where my adult sense kicks in and why this is better for the teenagers -- I found it a bit melodramatic. The guy breaks up with her in the beginning and she falls into a pit of despair for months. Okay, I remember my first breakup, and yeah, it was sort of all-consuming. But to be like that? Am I just forgetting what the emotional roller coaster was like as a teen? Because it seems crazy to extremes, in a way I almost don't condone. I don't like the whole, I can't live without you thing, not when you're seventeen. It was too over the top for me, and I think that was my biggest quabble with the book, given its premise. Everything else was good. I liked the development of Jacob Black as a character, and the new turn (and addition of cool new mythical creatures) that it took. I also liked the end, the collision of events that causes them to go to Italy. It's pretty crazy, yet believable and it made it hard to put the book down (yet again).
My sister kept asking me who I liked better, Edward or Jacob? And when she first asked me, I'd only just started New Moon, and so I said Edward, because he really was breathtaking that first book. By the end of New Moon, I said the same thing, but with reservations. I don't know if it's the author's intention to make us feel that way -- the same way Bella must -- if so, good job. So, I liked this one, but not nearly as much as I liked the first.