It took me two attempts to get through Stephenson's Cryptonomicon even though it was thematically up my alley. He includes so many tangents and explanations that it can be tedious at times, however interesting some of them might be. I'd almost prefer footnotes to the longer tangents so I could just get into them optionally if I choose.

I enjoyed Snow Crash, but I think he's better at world building than following a plot to a satisfying ending. It seems a common criticism that some of his books end a bit abruptly without enough investment in the conclusion, especially in contrast to the significant detail he puts in to the world building.