I, too, am curious about that. I'm writing the sequel and I know I had a system but I can't remember what it was. Seriously. Let me think...
Language and travel technology are a big part of TYOV. I know that I grew the complexity of the prompts in regards to those two factors as I imagined the timeline of the character progressing. Same thing with society as a whole–later in the game it is assumed you are doing complex things to fit into evolving social structures.
The first few Prompts are very much about not knowing how to be a vampire. Those are obvious though.
I know that I spent a lot of time worrying over gaining and losing Resources but I think that was mostly fruitless labor. Some of it is arbitrary.
Yeah. That sounds pretty good. I want to thank you for asking me this question. I'm struggling with the Prompt order in the sequel and you've helped me remember that the factors that ordered TYOV just aren't present in the next game.