Personal Machines and Portable Worlds

What makes a "world" for me is that there are a few basic rules from which all the gameplay can be derived; something where the basic axioms don't generate a rich theory is just "on rails" and at best a trivial world (something where the basic axioms generate anything and everything is even worse: a degenerate world).

What makes a machine "personal" for me is that I need to engage by putting in some creative input in to get anything out; doodling on a sheet of paper is personal, but clicking on and desultorily reacting to some external stream is impersonal.

In these senses, the "engagement" of the monetised web is neither personal nor a world:

  Which Power Ranger are you?
  Take this quirky quiz
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https://www.youtube.com/watch?v=k1BneeJTDcU