Luis G said:
The only bad thing i found in it was the excessive stupid humour, too much Gimli fun, i'm sure that wasn't on the book.
You're right. There was a small amount of humor with Gimli in the books, but it didn't make fun of him the way the movie did. There was no slapstick of the "dwarf-tossing" sort in the books.
One thing that was cut from the movie(s) was Gimli's deep reverence for the Lady Galadriel. Because that wasn't brought out in the first movie, it was also neglected in the scene where they first meet Eomer. That was a shame, because I love his line about being taught manners under the gentle tutelage of a dwarf's axe. (Or words to that effect.) It was humorous, yet it didn't undercut the heroism of either character-- it enhanced it.
All the jokes about Gimli's height served to make him look ridiculous, and unheroic. Yeah, he could fight, but that's not what makes a person truly heroic. It's their moral stature that raises them above the ordinary, and the characters in the movie are sadly lacking in that.
Something Jan pointed out that I thought was dead on, was that because they undercut the heroes so much, the movie makers had to make the orcs look that much more disgusting and psychopathic. The evil of the heroes' opponents has to be over-emphasized so that we will still recognize the heroes as being good by comparison. It shifts the overall tone of the story. Instead of being about good vs evil, it's about mostly good vs psychopathically deranged. Somehow, that's not nearly as inspiring.