When I was a kid there were kids and adults - 'young adults' didn't exist. And there were kids' books and adult books with nothing inbetween. Times have changed, and I think on the whole for the better, in that we now acknowledge that there is a transition period between childhood and adulthood, so it seems only fair that these young adults get their own books - and that the rest of us should be allowed to read them too.
I picked up Twilight partly to see what all the fuss was about, not having seen the movies, and partly to find out what young adult literature was like, and I'm happy to admit that I enjoyed it. Yes, Bella can be a whiney little so-and-so, and when she gets older she should read Women Who Love Too Much, but I remember being an angst-ridden seventeen year old myself so I could relate to her. And much as I cringe at the idea of Edward having spent the last century or so as an arrogant teenage prat, there's no denying he's just the kind of arrogant prat that many angst-ridden girls go for - so many of us were stupid enough to always go for the out-of-the-ordinary type, because nice, everyday boys were so 'boring'.
I never expected the book to be really great literature, and I think you're bound to be disappointed if you look at Twilight with too adult eyes, but it was an engaging, fun read. I'll take off one star because the long stretches of dialogue between Bella and Edward did get a bit tedious, but the story held my interest to the end - which many more literary books fail to do.
A great thing about getting older is that you can like what you like and not care what anyone else thinks of you because of it, so I'm happy to repeat that I enjoyed Twilight and plan the read the rest of the series. Congratulations to Stephenie Meyer; as other reviewers have said, she pulled it off and laughed all the way to the bank. Good for her!