As much as I love White Noise, I think my interest in more DeLillo is rapidly waning. Everything he writes is a meditation on themes without a story. This is fine most of the time, but when it's the same theme(s) several times, it loses its appeal.
As always with DeLillo, the characters are types used to perform a function. They are tools, not actual characters with arcs or motivations. Sometimes they spout interesting or insightful sentences (though always in a sterile, clinical style) which is why this book gets its three stars: philosophically, it's intriguing. Probably my favorite passage from this slim text:
"The blur of technology, this is where the oracles plot their wars. Because now comes the introversion...the omega point. A leap out of our biology. Ask yourself this question. Do we have to be human forever? Consciousness is exhausted. Back now to inorganic matter. This is what we want. We want to be stones in a field" (52-53).

It reminds me of Metallica's "Spit Out the Bone"