What are the motifs in A Supposedly Fun Thing I'll Never Do Again: Essays and Arguments by David Foster Wallace?

The Emptiness of Consumption is a recurring idea. In the titular and final essay, Wallace goes on a luxury cruise because a magazine pays him just to write about the experience. Wallace is impressed by the all luxury the ship has to offer. The meals are all extremely good, and passengers can eat as much as they desire. Wallace loves the size of his room and is amazed by water pressure in his shower. Everyday there are a multitude of activities for passengers to take part in. The ship, including passengers' cabins, is also kept immaculately clean by the ship's staff.