One thing to note in the section on Pintos and Paints - there a several breeds which don't use either of these terms, instead using "Spotted" - among them: Missouri Fox Trotters, Spotted Saddle Horses, and almost all the draft breeds.
Look into the really unique and colorful "PINTALOOSA". Now those are horses of color! Of course they can't become a "breed", but, there is a registry for these unique equines. The Pintaloosa Horse Registry Association. Pintaloosa's come in all shapes and sizes and of course their most beautiful array of color and patterns! Pintaloosa's are from the breeding of an Appaloosa and a Paint/Pinto (or visa-versa) and with this there can be an explosion of unique patterns and colors. There is a book that was written in 2008 by Rebecca Rogers called "The Pintaloosa" and contains 100's of photo's and descriptions.