I actually enjoyed every part of the Lord of the rings books, including the scouring of the shire. I was annoyed with most of what was cut out and even more annoyed about what Jackson added in. Things like Elves at helms deep, removal of the grey company and elronds sons, no Dol Amroth knights, especially seeing as Prince Imrahil was really one of the main characters in return of the king.
The fact Jackson showed more of the pellenor fields battle than was needed, seeing as Tolkien really payed not as much attention to these battles only telling what needed to be told.
Prime example of that and something that really irked me was the army of the dead. Why Jackson felt the need to include them in the battle of pellenor fields is any ones guess. It was a terrible idea and just portrayed that pretty much anything anyone else was doing at that battle was pointless.
But yes, films bad, books good. Should have made 6 films instead of 3 and had 1 film to each book and actually told the story that was written and not just changed it as he saw fit. Little changes are fine but not to the sort of scale Jackson did.