Knobs, pulls, and hooks don't have to be predictable.  Hardware in the "design" sense (i.e. knobs, hooks, handles, pulls, racks, switchplates, and other metal home fixtures) is often overlooked and can easily change the mood of a room by adding unexpected colors, textures, and shapes.  Personally, I love playful touches like the Rabbit Head Knobs on the cabinets below from a kitchen I designed in Coastal Maine.  For more inspiration, check out the menagerie of animal knobs and hooks from Anthropologie below...