My dog likes potatoes best. Come to think of it, so does my cat. But, my cat prefers hers cooked.
Our Springer has a sweet tooth. I can't hide Hershey Minatures or Junior Mints in my office desk any more. The kids see the dog setting in front of my desk and immediately know where my "supply" is hidden. He is also very fond of popcorn, grapes and Rainer cherries. One of my favorites past-times is watching him bob for ice cubes in his water bowl.
Our dog loves potatoes also. But that's probably because we have potatoes with every meal. Damn Irish boyfriend.