I have noticed that now books have become less interesting and meaningful. New books have less good language and I have had to broaden my taste like you. I have read books that are written as 'formula novels'. I have become dissatisfied by reading because of the quality of books. It's either, werewolves or a girl trying to fit into a group of cliquey girls. I read the books that everybody else reads and they don't see how pointless they are.
"What are some current novels that you think may define the first decade of the 21st century. There seem to be many mainstream works written for monetary gain and lacking in a meaning."
All of these books written for young adults and children are for monetary gain. Good books and authors are "dying off". If you know what I mean. Occasionally I will find a book that I love, once I'm done I am Yearning to read more books that mean something and are worth reading.
This is a shout out to authors to write something great, not just a book for money. Give people something to tell future generations: read this book, it is a brilliant classic from early 21st century. In the hopes that they will enjoy it.