I've read them all and seen all the movies. I frequently reread the series also. I've also read the Tales of Beedle the Bard, Fantastic Beasts and Where to Find Them, The history of Quiddich book and the What's Your Story edition that has a (very) short story about James Potter and Sirius Black when they were teens. I also have a copy of a fan-produced edition of Advance Potions Making.
John
John