Because Terry Pratchett was so restrictive with his merchandise licensing, I always feel satisfied when I buy a Discworld collectible. The quality is always above standard. You can tell that these are items designed and created by real fans of the Discworld. They feel genuine.
I've always been a collector. Not a serious one, but I like things that remind me of feelings, experiences, or stories I've enjoyed. Considering I've read quite a few Discworld novels this year, it's no surprise that I became curious about what collectibles were available.