The TOS movie "trilogy" of TWOK, TSFS, and TVH were the most memorable of the Star Trek movies, at least for me, and pretty much the only ones I ever watch over and over. Like with ROTJ from Star Wars OT, I never realized that a lot of people disliked it in the first place. Although I do have to admit that the movie is kind of slow during the first part of the movie and again towards the end, there are a lot of really memorable scenes such as Kirk, et. al stealing the Enterprise, one of the more "classic" scenes in any of the movies before or after, as well as Kirk's decision to blow up the Enterprise with the Klingons on board. It was a pretty drama-heavy movie to be sure but the crew had just lost Spock, they were going to be losing the Enterprise, and then Kirk unexpectedly lost his son to the Klingons. It was also a neat reversal of Spock's decision in TWOK to sacrifice his life to save the crew ("the many") whereas in TSFS, Kirk (and his crew) sacrificed their careers, their ship, and Kirk, his son, to rescue Spock ("the one"). Pretty heavy stuff to be sure but it was rather well-written and it all still holds up for me rather well IMHO.