I used to read a book a day when I was younger. Then stress, life, depression, anxiety, etc, got a hold of me over my teenage years and I stopped reading for too many years after that. I simply couldn't retain things I read. I couldn't concentrate. (I got back into comic books for a few years awhile back after dropping them for years as well but they're quite a bit easier to retain with all the pretty pictures.)
I got the entire Twilight series for Christmas from a coworker two years back. I have to admit I couldn't figure out what all the fuss was about either, but after being on a reading hiatus for so long, I sucked up the first book (pardon the pun) as if I was a recovering alcoholic who hadn't had a drink in ages. It was the perfect book to introduce me back into reading. But I also enjoyed the books for what they are, not classic "masterpieces", but simply an enjoyable way to pass the time.
I really enjoyed all four books. I didn't mind the teenage angst because the books actually brought back good memories about a moody boy from high school that I used to pine over, when things were more simple and less complicated. I could just enjoy them as a love story unfolding, even if it's a bit of a silly one. (I was also a big vampire fan years ago, loved Anne Rice, Poppy C. Brite, etc)
I think the reason why these books are so popular is even though they may not "measure up" to some in literary history, they do what books are supposed to do...entertain us. Make us believe that another world that we might like better, could exist in our imagination somewhere.
I think they also made teen girls (and adult women) who read them feel protected which is very enticing. Edward loves Bella so much, he would give his life for her! Dramatic? Yes. A bit corny? Sure. But it's still something that many girls dream about. The brooding outsider, falling for us, and only us, and loving and protecting the girl they care about forever, and ever, and ever. Who doesn't want that? I wouldn't mind it, that's for sure. So, if I can't actually have it, or find it, I read about it happening to someone else instead. Close enough.
With the divorce rate so high, and the shocking amount of teenage girls being bullied in relationships, it's no wonder these books hit a cord with so many. We long for love, and these books give us a perfect little version of that, even if some who read them aren't a big fan of the way they are written.
I'm kind of surprised at the knocks Stephanie Meyer has taken over these books. These books got me interested in reading again, and now I'm back to reading a book in a day like years ago. For that, I will always be grateful for the Twilight books.
Just my two cents...