Golden Japanese Forest Grass - I really cannot get over Japanese Forest Grass (Hakonechloa macra 'Aureola', zones 5 to My favorite is the variegated variety. I planted mine under a Japanese maple, and the contrast was genius and it has so much movement.
Walk-On-Me Plant is a creeping thyme that grows only tall. (Also called Mother of Thyme). Plant around flagstones or for a decorative, dense-growing ground cover. Walk on it and the whole area will be filled with the aromatic smell of fres.