The Trademark World is fascinating. If you don't have a trademark do you really have a business? If you don't enforce your trademark do you really have a trademark? If your trademark isn't making money for you, you need a different attorney.
Non-traditional marks include three-dimensional, sound, single color, tactile, holographic, scent, movement marks, and more—basically all marks that include elements other than character data (words, letters, numerals, etc.) and designs.