In time past I could have probably said that my favorite band was Tori Amos. These days I don't really have a clear favorite, though. I could also say that my favorite anime is Tenchi. Well that's probably still true.
But what I was thinking about is that often times I simply won't be able to say that "element X" is my favorite out of a given set. And I think that's probably because there are a variety of classes of things out there, and it's easier to have a favorite within that class of things if you happen to favor the class to begin with. For instance, I don't really have a "favorite" band these days, but I also happen to think that most music being put out is rather sub-par in quality. I can't think of a favorite book, but then I don't really read much these days. I can think of a favorite anime, and I still watch anime.
Shrug, just a random thought.