I have read most of the Discworld novels.

While he certainly has a great sense of humour and sharp wit, you cannot get away from his underlying mockery of religion and the greater meaning of life.

The way Death is parodied, the way Small Gods depicts the small mindedness of the gods and the way the meaning of everything is fooled around with with the so called "auditors" being in charge of everything, is far too reminiscent of Douglas Adams's nihilistic masterpiece, the Hitchhikers Guide to the Galaxy, for my liking.

Actually, this modern trend of relativism leading to the ultimate message of "nothing really has meaning" strikes me as very similar to Ishamael's supposed philosophical views as depicted in his Age of Legends writings "The Absence of Meaning" and so on.

I far prefer the affirming themes found in Dean Koontz's later books to the nihilistic satirizing of the Meaning of Life found in the works of authors like Pratchett and Adams.