Andrea Harris figures out Bella Swan’s motivation in the Twilight series:
The author wanted her heroine to be a “good” person so people would admire her, but she (the author) is neither a good writer or a person with more than the shallowest insight into human relations. Thus, she thinks that the way to show the goodness of her character is to make Bella “humble” and “unpretentious” and that the way to do that is to show how much Bella hates shallow, ostentatious things like parties, expensive cars, and people being nice to her. Really. Of course, the author wants it both ways, so she has the heroine take these things anyway, but makes sure that the heroine is not happy to receive them.
This may be why I don’t connect with the series premise: I may be humble, but I’m not particularly unpretentious. Nor am I, um, crepuscular.
On the other hand, some songs from the soundtracks of the various Twilight films have earned my attention, so at least there’s that. (Example: “Heavy in Your Arms” by Florence and the Machine, which runs under the closing credits of Eclipse.)