The androids don't come off very well in the book. I felt more for Rutger Hauer's character at the end of Blade Runner than I did for any of the androids in the novel. His Roy Baty is nothing like that of the book. None of the androids in the book come close to any kind of "tears in the rain" speech, nor do they seem capable of it. The replicants of the film are much more complex emotionally.
The author Roger Zelazny wrote the introduction to the edition I have of Do Androids Dream of Electric Sheep?, and I'd like to quote him here:
"His management of a story takes you from here to there in a God-knows-how, seemingly haphazard fashion, which, upon reflection, follows a logical line of development- but only on reflection. While you are trapped within the spell of its telling, you are in no better position than one of its invariably overwhelmed characters when it comes to seeing what will happen next."
Zelazny ends the introduction with this:
"...that which is left of a Philip Dick story when the details have been forgotten is a thing which comes to me at odd times and offers me a feeling or a thought; therefore, a thing which leaves me richer for having known it."