No Gods, No Masters is one of my favorite HDG fics. If you're an anarchist or some flavor of leftist, or like slow-burn romance with a healthy portion of philosophy, it's a worthwhile read. Totally not smut, but still well spiced.

The Affini must think they're real clever introducing these xenodrug laced snack foods ahead of their arrival.

You know I think you could get a lot of mileage out of a version of “I Have No Mouth, and I Must Scream” but with robot girls and kink stuff.
Look Portal 1 & 2 changed my brain chemistry I don’t mind morally dubious robot women.

HDG for all the robot fuckers out there