This is by far the best movie in the series and has a much more emotional resonance, I think, because all the actors are finally comfortable in their roles. Edward had proposed to Bella at the end of the second movie and at the beginning here she still wants him to change her into a vampire. She says that if she agrees to marry him that he will have to change her so they can be together forever. He doesn't want to convert her but wants to be with her. The Native American/Werewolf, Jacob, still has feelings for Bella and hates the vampire. He wants Bella to admit her feelings for him. Rather than just being all mopey there's actually some resolution to their problems and they get a better understanding of one another as well. Plus, there's a lot more violence and cool effects. The red-headed vampire Victoria, who was pissed that her lover was killed in the first movie because of Bella, wants revenge so she's turning people into vampires in Seattle. She knows one of the Cullens is psychic so she has one guy doing all the planning and organizing so they don't know it's her pulling the strings. When there's the final battle, with the Cullens and werewolves fighting the new vampire army it's freezing outside, so the vampires break apart like ice when bitten by the wolves. And when Jacob is injured, half the bones in his body broken, they have to be re-broken again because his rapid healing mended them badly. I also liked that there were flashbacks on two of the Cullen vampires, one woman who lived in the early 1900's and Jasper, who fought in the Civil War. That was cool and shed a lot of light on their personalities.
If I hadn't recently ended an intense relationship I probably wouldn't have liked this movie nearly as much as I did, which goes to show you get out of a movie what you put into it and how good it is depends on how you're feeling at the time. So I woke up on the right side of the bed for this one.