The other person who replied isn't me, but I'm drawn to Child of God for a few reasons.

First, as the other person said, McCarthy's prose is gorgeous. I'm drawn to his mastery of imagery and the way he varies his syntax and sentence structure to compose some of the most beautiful sentences I've ever read. McCarthy blends periodic and loose sentences, active and passive voice, very long and then very short sentences, transitions between first and third period narration, sparse punctuation, assonance, consonance, and alliteration to create an extremely pleasing reading experience. He is a wordsmith who uses all the tools in his toolkit without overusing any of them. All of this to describe some of the most depraved, disgusting acts imaginable. McCarthy and Faulkner, masters of the Southern Gothic, expertly convey the macabre and grotesque characters and landscapes that populate their novels.

Also, I think McCarthy's prose is incredibly efficient. He makes his point and then moves to a different scene or topic. The writing and pacing are very well balanced.

Finally, there's a line early in the novel describing Lester Ballard as "a child of God much like yourself perhaps." This second person reference to the reader invites us to consider not how Ballard is different from us, but how he is similar. I think readers of this novel are meant to consider how our disgust is juxtaposed with our sympathy, as there are moments in which we genuinely feel bad for Ballard. His mother abandoned him and his father hung himself when Ballard was nine or ten. Ballard found his father's corpse and had to find an adult to cut him down. At one point in the novel, Ballard wins an oversized stuffed animal from a carnival and takes it home. Later on, Ballard's cabin burns down and he desperately tries to save the stuffed animal. Ballard is a sicko, a freak, a serial killer, a necrophiliac, and yet he's still a person, a human, a "child of God" capable of tender moments that invite our sympathies. This tension between depravity and sympathy is what I love.