Cats can definitely have preferences, but then again, so do humans, and those preferences aren't always what is best for us! I noticed the above anon said Meow Mix. Awhile ago I actually went and checked a bunch of labels just out of curiosity, and Meow Mix was like, the worst one. Total sawdust food.

For what it's worth, a good method for switching cat foods is to combine the one they like with the new cat food. Let them have it mixed for awhile, and slowly get rid of the old food.