I hate TLotR trilogy. I have nothing against long movies (Gone with the Wind is one of my favourites), but this trilogy is sooooo slow and sooooo boring and uninteresting. They spend too much time on characters I don't care doing things that are not that important and they keep too many plot fronts open at the same time.
Return of the Jedi is much, MUCH more enjoyable overall. It's not my favourite Star Wars movie (Empire is), and the whole Ewok thing is kind of silly, but it is still a great movie, and as a conclusion of its trilogy... I don't think you can get much better than that.