I'm still adamant that I won't read any of the books until I see Deathly Hallows, Part 2 twice, the second time being part of a marathon where I watch all 8 movies. That way, I get to see the entire film series, at least once, as objectively as possible.
Then I'm going to re-read all 7 books, and watch the movies again, so I can watch them the way my mother watches each new one - with an impossibly critical eye, comparing every scene in the movies to every chapter in the books.