I found Neuromancer and and Count Zero eminently forgettable. I never read Snow Crash, so I can't really speak to it though I've read a half dozen of Neal Stephenson's other novels, all of which I found rich with ideas. While I appreciate the literary style, I honestly can't remember the plot of either Neuromancer or Count Zero.
Snow Crash is built around an airport novel style narrative.
Neuromancer has a far more literary tone, and is trickier to digest.
That's the entire reason Snow Crash is cited. Airport novel readership is far more widespread.