I'm a huge Potterphile. Somewhere between the moment when J.K. Rowling plopped me down in the middle of Privet Drive to meet a lonely little boy to sobbing as a young man walked into a forest (not-so) alone, I fell in love with the characters in those books. Truly, deeply care about them.
She started the writing process for Harry Potter in 1990. I was 12. I'm not even sure if Daniel Radcliffe was born at that point. Wow.