The nature of the Doctor as an artificial life-form was a dominant feature of not only the character but the series, something some fans liked to compare with Data from Next Generation. Yet I would argue that Voyager did more to seriously explore this than its predecessor, making it one of the elements I like to point to when trying to make the argument that the series deserves more respect than it generally gets.
In this episode, the Doctor runs into a Delta Quadrant hologram who metaphorically suggests that he could stand to get a little more respect from his own crew, because in the worst case scenario he could easily become taken for granted (and become homicidal!).
"Revulsion" is certainly episodic, not planting any obvious seeds for future stories, but it's a good reminder of what you can expect from even the most average Doctor entry. In short, he's another key member of the Voyager ensemble, easily the one the show's creators tended to support most consistently.
Franchise * Series * Essential * Character
Memory Alpha summary.