I suppose this sort of ties in with the eternal erotica vs. pornography discussion, which never gets resolved, everybody seems to have their own definitions for those terms. I will say that my own writings (I'm an artist first and foremost) do tend to lean more towards the explicit and pornographic. Even at that though, where possible, I do try to develop characters, and settings, especially if they are longer stories (around the 10k words mark) or if the characters or world are recurring over the course of several stories. In such a case it's my hope that a setting can become compelling enough for a reader to look forward to the next story regardless of the fetish element. Sometimes this development occurs organically. For example, I've written a story (yet to be posted, I'm keeping it for a future issue of FantasTickler zine) titled "Aldegonde's Consort". The story started of as an experiment, an exercise in F/M themed story writing. But as I was wrapping up the story (which had grown to about 12k words) I became so fascinated by the titular Aldegonde, and the character of the (at that point nameless) protagonist, I just had to write a sequel in which these characters (and the setting -the world of Gargalesia) are explored further, and that one has since grown to a mammoth 60K+ words novel sized project (yet to be finished).
In a technical sense, tropes and stereotypes -when used properly- can be a powerful way of setting up stories quickly, when the story in question is very short in length. I remember one of the profs at filmschool pointing out how this is done really effectively in the Simpsons. An episode is really short, and for a newcomer to the series, it must be made clear in a matter of minutes what the characters are about; hence on the surface they are stereotypes. That doesn't mean of course that they should stay that way. with the characters in place, one can then start to explore their personalities further.