my two favourite works of his are "night watch" and "going postal". it's honestly super impressive that they were written so long after he started to decline and were still so good.
I'm currently in the middle of a complete chronological reread of the discworld books, just finished "thud" and "wintersmith" back to back and while they were definitely weak in places it's amazing how much of his genius still shone through. feeling a little apprehensive about the later books though, I remember some of them being really bad, especially "snuff" :(
Night Watch is definitely as good as the peak 90s City Watch books. Thud had bits of standout quality too. Some of the weaknesses of later books might be less pure weaknesses and more people distinctly remembering the same characters encountering similar characters with a similar message before.
I'm currently in the middle of a complete chronological reread of the discworld books, just finished "thud" and "wintersmith" back to back and while they were definitely weak in places it's amazing how much of his genius still shone through. feeling a little apprehensive about the later books though, I remember some of them being really bad, especially "snuff" :(