Two thoughts
I've actually been asked #24 ("What well-known person would you be?"). They were serious, and thought it was a good way to get to know what kind of person I thought I was and what kind of person I wanted to be. Fortunately, it was something that I had thought about (not as an interview-prep question, however) so I didn't panic.
Unfortunately, there is a "right" answer to many of these (even the 'opinion' ones), so if you don't provide what they have decided is the "right" answer, they can reject you "objectively"