I'm not actually sure I think Kristen is that great of an actor to tell you the truth. Her emotions seem to run the gamaut of one: dead. I've seen her in other movies and basically she plays her awkward self in every role (she's even admitted that). So is that good acting or just good at being who you are?
If Robsten didn't have mega chemistry I would not have liked her as Bella, because aside from looks, she's not who I pictured Bella to be as a person.
So I'm not sure if she'll do much for me in the Runaway. But I adore Dakota who I think is gonna be even more talented once she's legal.
Kristen's an incredible actress. I've been a fan ever since she did Speak... such a powerful performance! I do think she'll get a better chance to showcase her abilities in New Moon. Bella goes through so much when Edward leaves. I've read the Saga 11 times and I always take longer to read New Moon because Bella is in so much pain that it just breaks my heart! As far as Kristen's look is concerned, I like it better in Twilight, but I also think she could shave her head bald and still look beautiful.