I don't think you need to match a garden too closely to the personality of the client(s). Why make a garden that is a repeat of your client? Why make another them for them to live with? What if instead a garden was like another member of the family. Related, but it's own distinct being. With it's own wants and desires, it's own merits.
You learn to love the garden - you learn to live with the garden.
So relate it to the client, but don't design it to mimic the client.
Those are my thoughts today, anyway.
Hamamelis x intermedia 'Jelena'.
Photo Credit: Leaves N Bloom Fine Art & Photography