I found this to be a most insightful exercise in finding out how easy/ hard it might be for me to write in the genre and style of that author. Interestingly I found my version of Harry Potter and the Philosopher's Stone to be stilted and boring. Sorry guys I can't find that one at the moment to share. I'm not advocating copying another author, just trying out their style to see how it fits with your own writing style. It's simply an exercise.
However, here are some examples of my other first pages: