I like portal fantasies to a point. Amber is fine, and so are the transported to another real world. If it's transported to a world of fiction it has to overcome some hurdles. And if it's transported into a game, then no, it's not for me at all. To quote Katharine Ryan in Taskmaster season two about sports: “I don’t care where the ball goes!” and that's how I feel with transported into a game or using game mechanics as a shorthand in fiction. Feel free to love LitRPG but there's nothing about it that feels interesting to me.
Okay, I lied. Tron is kinda okay. So that's the exception there. The transported to unstable made up universes is where The Strange rpg lost me — it would have been so much better if the worlds had been real. Real universes influencing the imagination of authors in this one? Cool and gives something to work with. A universe created by an author and they don't know they're living on borrowed time? Far less cool.
At least to me.