Great topic, Neal.
I have found my beds that have matured I just love. I did plant a lot of things way too close together. But the trees and shrubs that I planted when we moved her are now maturing, and I just love the look.
One disturbing thing, maybe this cubit members can help me with~~with global warming it seems my flowering is over before the summer actually ends. Where I used to have flowers last throughout the season, by the end of the summer it seems pretty colorless. I might try a few perennials that are z7, to see if they last longer. I suppose annuals are an answer, but I would rather concentrate on perennials. Any ideas will be welcome.
But, I'm with you, I just love how one year, one plant does so well, and the next year something else might steal the limelight. Gardens are certainly not static.