E.g. in Reaper Men, I really liked the story of Death & Miss Flitworth. But the fresh starters in the mall were garbage.

Going Postal is surely among his best, but IMHO the small part with the wizards should have been left out.

The fifth elephant was a story that grew on me. I started out finding it Meh, but after a reread I found it rather good.

The witches were also something that got better as it evolved. Equal rites wasn't that good, but Maskerade was a lot better!!!!! I'd say 'The sea and the little fish' would be my prefered witch story, but it isn't even a book.

For the best, I'd go with Night Watch.