I saw RotK yesterday and Mark Levin has it exactly right. I would have loved to see a longer movie, and told my friend who saw all three movies with me that RotK actually could have been two movies.
And here's my big news flash review after watching all three. PJ should have cast the man who played Eomer 
as Aragorn. YES! I never liked Viggo as the king; only as Strider, and I do not find him an attractive lead excepting in how very well he acted out Elrond's castigation that "men are weak." Eomer, despite his youth (in real life) carried his role extremely well and would have been a very believable, very honcho, Aragorn, 
and a great love interest for Arwen. All they'd have had to do is make him up to look a bit older.
[New comment: I know PJ got into a major bind when the first Aragorn didn't work out; Viggo was flown in without time to ramp up to the physical prep for the part, from which he recovered well, they say ... but I will always regret that the real life Eomer (can't remember his name) didn't get the part. Other than that, I loved this movie and will see it again and again, and give it 9.8 out of 10.]
These critiques are not because of being a starry-eyed teen as I am neither.