Tintin, please allow me to be an exception because I have 3. I love them in that order:
Psalms and Job because both of them shows how hard tribulations and defeat can be sometimes and then it must turn to victory at the end. I feel in Awe when I read the words of praise and joy from David and Job after the terrible hardship they go through. It helps me a lot to see the importance of faith.
The third one is Daniel. Again I love to see how God saved him.