Well,some humour in the movie was inaprotiate,and Tolkien wouldn't be happy if he saw that,but remember,it's a movie.
And every good movie director doesn't make a movie only good-he puts in something that will attract people to the cinemas.
Battle scenes were for those who love action,Aragorns dreams about Arwen (which became boring-he dreams of her and he's back from dead if needed
) are for those who love romantics,and PJ made Gimli way he made him only to attract people who love comedy.
And,well...I find that some of his actions are funny,but not all of them,but that's ok.
The only thing that I dislike is the way PJ made Legolas-he is a street-skater.Both in TTT and ROTK he has to skate on something.
See,that's what I noticed to be bad.You noticed too much humour,so it's a matter of personal taste,and we can't argue about that.
(If we continue this tread I will have to add Eomer to the Buddy list-he's so good in defending his opinions
)