I first learned about wall vases while I was in Japan. Traditional Japanese homes have few surfaces available for vases. One accommodation was the development of wall vases, called "kake hanaire". In traditional post-and-beam-constructed homes, these wall vases are hung from the posts and the window framing...inevitably bringing inside, whatever is blooming outside.
Old Mr. Matsuyama once "schooled" me, reminding me: "Dick san, always remember that the vase is for the flowers....the flowers are not for the vase." Said another way: "Don't upstage the flowers with a loud and attention-grabbing vase".
Too often, I think, my preference for "more-is-more" will have disappointed my old friend. But I'm finding my way to a non-Japanese approach to the wall vase.