I have different "favorite books" of the Bible.
The book of Tobias is up there, for being touching and beautiful (I know beautiful is an over-used word, but the story is really better than any tear-jerker that Hollywood could ever come up with)
For personal enjoyment and fascination, I enjoy the historical books of the Old Testament (Genesis, Judges, Paralipomenon, Kings 1-4, etc.)
For spiritual edification, I like the Gospel of St. Matthew. If I've read enough St. Matthew I might read St. John, and then maybe the first few chapters of St. Luke (for the unique St. Luke stuff). St. Mark is a miracle-fest, almost a Cliffs Notes of the Gospel.
I also enjoy the Sapiential books (books of wisdom): Ecclesiasticus, Ecclesiastes, Proverbs, etc. for insight and ...wisdom, of course.