The Sunset Western Gardening book has a long listing of shade plants ranging from both filtered to full shade and all will be suited to western climates, depending on hardiness. Many plants listed as preferring full sun will tolerate light shade, but the more shade they are grown in, the more leggy they will be and the less flowers they will produce. Lilies will tend to stretch and lean towards the sun in much shade and nasturtiums really do prefer full-on sun and lean soils. Hostas, ferns, aquilegia, dicentra and any shade loving annual will work fine in most areas. And don't forget some shrubs to add height and substance - hydrangeas, azaleas, hardy fuchsias and camellias, to name just a few. You really aren't going to be too limited for a variety of interest and color.

I used to live there, wonderful climate. Honeysuckle gets nastily invasive, so don't plant it. Daylilies would be great but lilies won't do well. Nasturtiums had nice leaves but few blooms. Things that did well for me: primroses, St. John's wort (hypericum calcinum), escallonia for hedges, heavenly bamboo, daffodils, fuschias, tuberous begonias. Star jasmine (trachelospermum) is the best vine - does well in shade, grows quicly, evergreen foliage and a heavenly fragrance. Have fun

To me it seems like your land is already established. You just need t add the finishing touches. If I was moving in I'd plant hosta, ferns, mahonia, or other shade loving plants around the deck in containers. Nice aquisition.