Gardens... should be like lovely, well-shaped girls: all curves, secret corners, unexpected deviations, seductive surprises and then still more curves. ~H.E. Bates, A Love of Flowers
I don't think the curves that H.E. Bates refers to should be just in the shape of the garden as a whole, but in the individual plants as well. I love the sense of motion in plants. On my drive home from work each day I pass a home whose lawn is bordered in manicured shrubs. Those shrubs have been pruned into precise geometric shapes - entirely unnatural and stiff, with no sense of motion. I prefer that my flowers and plants look at least a little wild, looking as if they might decide to start dancing. (Maybe that's because I love to dance.) Or as if they need a little hair gel. (Maybe because I have unruly hair.) And I really love the graceful flowers, tall and slim. Those I'm jealous of!