Me too. I first read The Hobbit and LOTR and, although I liked them, when I really went crazy for Tolkien was when I read The Children of Húrin, from there I went on to The Silmarillion and there it stayed as my favorite book.

The Silmarillion is my favorite book. Now you have to reread it a couple of times to grasp many more things and to read smoothly haha. I have already reread it four times and will continue to do so :P