"Essentially? Yes. Worlds tend to be uniquely well-suited to the people they call to them. I have one friend who went to what we call a Drowned World--meaning most of its action was below the surface of the sea. She turned into a mermaid there. I have another friend who went to a World of monsters, with a huge, sinister red moon, where she does mad science with lightning, and she's happy as a clam. One of my best friends went to a World where every other living thing was a skeleton, and one who went to a World made entirely from sugar, and--I could keep going. Suffice to say I've visited several of those Worlds, and could see precisely why they were suited to my friends, even though they were not suited to me."