Yes, I would use the same approach to start with. Hormonal
  levels are measurable parts of our systems and it shouldn't be
  TOO difficult to come up with moods via various combinations and
  approachable metaphors to work with.

  I suspect if you look around a little, somebody's done at least
  the hormonal levels --> mood connections for some of them.
  Look at music. Advertising made a science out of "emotional
  appeals", as does movies and music is a HUGE PART of emotional
  manipulation - all nicely categorized.