That's an easy one. Not since I tackled Ulysses in college have I been too enamored of the stream-of-conscious style. I admire books like The Sound and the Fury (see here) for the masterpieces they are, but I generally prefer a good story, well told.
I don't mean I need a lot of action and adventure (although they have their place), but I like things to happen in the book I read. This is clear from my Top 10 list of favorites -- all are plot-driven novels.
I am interested to read answers of people who prefer stream-of-conscious or am I? maybe they could convince me, if my foot didn't itch or I could go get coffee first, just what is conscious, anyway? if a book could really convince . . .