Most interesting... This is kind of hard because most interesting is definitely different from my "favorite" titles. For titles I like, I really like one word titles (like Shiver, Nightshade, etc.). Also, I feel like titles are interesting in different ways. A funny interesting would be: Ten Things We Did (and probably shouldn't have) by Sarah Mlynowski. A creepy interesting would be: The Body Finder (or Desires of the Dead) by Kimberly Derting. I'm sure I have many more interesting titles, but my book self is in terrible need of re-orginizing, so it's kind of hard to skim at the moment.