I RP with some people on occasion, but it isn’t really my favorite thing? To be honest, my preferred place in the story, my erotic position, isn’t as the submissive or as the dominant characters being changed, but as author. I actually get off as the person designing and engineering the transformations, not as the person being subjected to them. It’s a bit voyeuristic, actually.
So, would I want to live out the fantasy of a TF? Not really, but knowing people do to my stories is a pretty big turn on, lol.