I read Diamond Age and then Snow Crash, because some friends recommended them, and then I read Cryptonomicon. It wasn't interest so much as boredom that spurred my reading the latter, but I would say it fundamentally altered my opinion of his works. When you read a 5-page summary of the theory behind Van-Eck Phreaking, juxtaposed with an essay concerning the foundations of sexuality, and you want more, then you're either a Stephenson fan or you're surfing Wikipedia.