It's true about the sparkles.
I was watching the movie (I carelessly stumbled across it at the video store, read the cover and figured it would be a decent vampire movie) when Edward says they don't go into the light, because it shows their true form. He takes that chick through the forest into the sunny patch and I was like "Hells yeah, we're gonna see black smoke, red eyes, membraned wings of awesome and fangs" and then he starts to sparkle. I think I lost a lot of respect for the movie there. So vampires don't go into the sun because it reveals their final form of... glitter? Ooh, scary.
As for Anne Rice, I enjoyed the Vampire movie and loved the Mummy novel. The latter wasn't exactly "teenage romance," though. Unless teenage romance involves a smoking hot resurrected Cleopatra to have sex with you and then snap your back like a twig afterwards. In which case Species, I imagine, would have quite an audience as well. Tongue action!
Thinking back, it's true that the Twilight story caters to a lot of young females. Even more so in the sequel where that native guy gets a haircut and turns out to be a wolfie, rawr. Vampires vs. Lycan-- woops, werewolves. Yeah, original.
Funny thing is, my sister has read the books and watched the movie and she's normally very, um, sane when it comes to judging pretty boys. I was discussing the movie with her and I told her how I didn't get the mania going on. The actor portraying Edward wasn't even that good-looking (I can say stuff like that without questioning my sexuality, by the way). She just dropped her jaw on the floor and told me he was such a "hunk" and dark and handsome. I was like, girl, look at his face. No, look at his face when it doesn't sparkle! Yeah, he's like 10% of the handsome seen in any teenage movie these days. Yes, he's tall and has that dark gothic /wrist thing going on, but seriously, he's not hot.
She couldn't follow me. It was then I realized that the mania had claimed yet another victim. A girl who will never again be normal until she nails that sparkly vampire guy who can't be with her but won't leave her alone.
Bleah.