I read all four books and I did quite enjoy them at first, actually. But they're not my favorite books and I wouldn't read them again. The whole Bella - Edward crap is annoying and just doesn't make sense. To me, anyway. But I liked the parts with Jake and all. So I wouldn't say it's a complete waste of money.
As for the vampire stuff: Yeah, you can show a new side of vampires. That's interesting. But no matter what, vampires are no angels! The complete opposite, really. And in Twilight they are shown like that. They're sweet, cool, loving, selfless, perfect nd glitter in sunlight! I mean come on...
To say the truth, I never really liked the vampires in Buffy, either. Just brutal, dumb killingmachines. The most of them, anyway. But then, there were also vampires like Angelus, Spike, Darla and Drusilla. THAT are real vampires for me.
In my opinion, vampires shouldn't be dumb and just kill, kill, kill. But they're not Gods gift, either. They're beautiful in their own way. Souless creatures of the night who can show love but lack of a conscience.
And you shouldn't forget that they are killers, no matter what. And Stephenie Meyer did exactly that. It's like she created this whole new race and stamped the name "vampires" on them, which they're not. Buffy didn't invent vampires. There have been stories of vampires since forever! And Joss took those Myths and created a story. Added a little there and here but never changed the whole image of vampires. He showed us that in some cases they can be good but you should always be careful.
Now, the actual topic: Everybody can have their own opinion. And if some think Twilight is their bible and Edward their God, then that's okay. I, however, am not one of them and never will be and though I don't really respect their opinion, I accept it. A lot of my friends are Twilight fans and I can deal with that as long as they don't talk about it 24/7.