There are three I don’t really like as much as the others.
Hogfather took the whole “Oh God of Hangovers” thing way too far, and generally I disliked most of the characters Susan meets. Takes most of the fun out of it, I think.
Lords and Ladies was just not up to par for a Witches book. I’ve loved every other Witches book, including my favourite Discworld of them all, but this one just didn’t ring the bells for me.
Interesting Times just failed to grab me at all. The cultural stabs seemed kind of tryhard, and the idea of seeing TwoFlower again didn’t really fill me with interest, so I went in with a halfhearted feel anyway. And there is such a thing as too much of the Luggage.
My favourites include, in this order:
Maskerade is just excellently written from go to whoa, the characters are spot on, the references are brilliant. As someone who has worked in Theatre (it was small and localised, but it operated just like any other theatre, from ego to backstabbing, from success to failure) I found it totally perfect in every detail. Love it.
Men At Arms was the first Murder Mystery, and I loved the change of pace from the ‘huge powerful magic gets awoken and takes over Ankh Morpork’ angle that was getting a bit samey. Great characterisations, and more Carrot/less Vimes, which I prefer.
The Truth is a lot like Men At Arms, in that it’s quite a change of pace, and the new characters were very likeable. Not so sure about the increasing use of Igors and Vampires lately, but they were funny at least.
Small Gods I have warmed to. Initially I didn’t like it at my first reading, but it’s grown on me since.