Me too. I love Perdido Street Station... except for the ending, which seemed grim more to make a point than from logical consequences. (Okay, I just did not want to see that happen to that character, but it was also depressing above and beyond what had already been set up.)

I love The Scar... except for some of the more grimdark moments, some of which also seemed depressing for depressing's sake. But the mosquito people! The setting! The very ending! So perfect.

The Iron Council had some great bits and a lovely climax, but as a whole, it didn't come together.

I thought The City and the City had a great concept, but the prose, characterization, and plot were too restrained. I haven't yet read Kraken or Embassytown.

Railsea is just perfect.