The first thing that you should know about me is that I am on the first chapter of The Half-Blood Prince so we're not really going to talk about the sixth book, OK? Let's go through the books/movies in order. Get it? Order? Order of the Phoenix?
Harry Finds Out He's a Wizard [Book One: The Sorcerer's Stone]
Well the whole entire book was at the Dursley's house until this. This was a BBBBIIIIGGGG change to Harry (and the wizarding world) so this has got to be one of our favorite scenes.
Harry Faces off with Quirrell and Lord Voldemort [Book One: The Sorcerer's Stone]
I think that we can all agree that when Harry is facing of with Quirrell/Lord Voldemort is one of the top two best parts of the first book.
Harry Faces off with Tom Riddle and the Basilisk [Book Two: The Chamber of Secrets]
Now we're onto the second book—Harry Potter and the Chamber of Secrets. Again the top part of the book is the one with the most action or/and fighting. So the top part of this book would have to be when Harry, Fawkes, and the Sorting Hat are fighting against Tom Riddle and the basilisk.
Harry Meets Sirius Black [Book Three: The Prisoner of Azkaban]
Next up we have the third book—Harry Potter and the Prisoner of Azkaban. Well, it's obvious that the best parts are the ones with the most action or the scariest parts. So therefore the best part would have to be when you meet Sirius Black and listen to his story.
Harry and Voldemort Meet Again [Book Four: The Goblet of Fire]
Now we have the fourth book—The Goblet of Fire. The part with the most action, the scenes that put you at the edge of your seat (more if you read the book but...) would be (drumroll...) when Harry is in the Tri/Quadrupral Wizard Tournament and the whole graveyard fiasco.
The Death Eater Attack [Book Five: Order of the Phoenix]
Finally we have the fifth book—oh you know what it's called! It's pretty obvious which part is the best and that would have to be the whole Death Eater chase but basically the whole ending was the best part. Some people would say that the part where Sirius dies is cool or whatever because it had action and death, but not me!
The Prime Minister's Surprise [Book Six: The Half-Blood Prince]
As you know I'm on the first chapter in the Half-Blood Prince so the best part would have to be the first chapter. [Papa's note: depicted in Lego form in the beginning of the clip below. That's the best we've got.]