I saw Twilight with Jennie way back when. I already was sort of not wanting to like it because it's a chick flick, but what really got me was when the girl sees the main vampire dude in the sunlight.* Instead of her being like, "Wow, that's pretty weird," she says "Wow. You're beautiful." I mean sure I'm watching a movie about vampires, but that really just took any bit of reality out of the movie for me. No one would react that way, not even someone madly in love with the vampire. It sounds stupid, but it's how I took it. It just solidified the fact that there is nothing redeeming about the series, it just exists to get girls in a tizzy.
* The vampires in the Twilight series don't burn up or disintegrate in the sun. Instead, their skin sparkles like diamonds.