A well designed landscape captures the imagination.  It seems to invite you in. Yet, that is only the beginning.  The functionality is often hidden in its theme.  Recreation, relaxation, socializing, privacy, or accessibility.  The desired purpose is skillfully created by the obvious and not-so-obvious.  Combine that with knowledge of regulations and longevity, to name just a couple traits, and you will achieve your vision.  Whatever you chose that to be.