Out of curiosity, which Discworld books did you try? The early ones have a bit of a different flavor from the late ones, and it's the later half of the series that had inspired all the dedication. Even within those, I think a Witches book can be very different from a City Watch book.

But I think they're all superior to 90% of novels, and Good Omens is one of the greatest novels ever written, so I'm obviously coming at this from a certain perspective.

(Although I'll agree that Gaiman isn't a big deal. I like some of his writing, but his only home run for me is Marvel 1602, and Sandman's first volume turned me off from that whole series. I can name a dozen modern authors who deliver for me much more consistently.)