Thanks for showing your place, Piffka; it's close to how I imagined it -- deep woodsy, with the shady conditions that come with a forest setting. What a difference from my subdivision locale! If I were living there I'd probably stick to the west-coast woodland tradition -- flowering shrubs, native perennials, and the nonbearded type irises.... Looking good, looking good.
Sozobe: you make it seem that your place is severely compost-deprived. You do have help, don't you? Avoid the bit of carelessness I commited in injuring myself (falling off a ladder=fractured foot, for example) in doing garden work. Focus on a defined section for the year.
May I suggest considering primulas -- they're easy as sin--here,at least-- which fill in spaces among shrubs and other nooks around the garden so cheerily.
Here, for example, under a lilac bush at the end of my developing iris bed. These are from a divided clump, set in last year., and should grow together by the end of the season and make a showy patch of groundcover for that spot.