I'm a TNG fan all the way, but my favourite STAR TREK movie is, and always has been, The Search for Spock. I really don't believe that Nimoy was overly concerned about the look of it, as much as he just wanted to focus on characters and there are a lot of close-ups, in this movie. Nevertheless, the cinematography is brilliant! And more than any other STAR TREK movie, TSFS captures what made TOS so durable for so many decades. There's references to TOS in this movie, without this movie winking at the audience ever. And, unfortunately, from The Voyage Home, onwards, the winking has never stopped in this franchise. There are other STAR TREK movies that I regard very highly and think of as almost works of Art, in themselves. But ... The Search for Spock always hits the spot, for me.