I love the Tile Builder! I got to use this last summer when I went to Chief's training in Coeur d'Alene (Dustin's whole talk was great). I have used it several times since. My favorite outputs have been my cobalt porcelain hex and my copper hex (shiny copper mixed with flat grey slate).
I would LOVE more substance players! Particularity one that outputs 'pallet walls' which mix textures of natural and painted woods, like in the attached picture. I'd also love more shapes in the tile one, particularly arabesque tile, mermaid tile, and diamond tile.