While The Final Frontier may be fairly ghastly, there are one or two genuinely good bits, including this moment near the end where Spockrescues Kirk from fake God:
Kirk: I thought I was going to die.
Spock: Not possible. You were never alone.
It's all in Leonard Nimoy's "Oh, please, as if you could ever think otherwise?" delivery.
This exchange:
Spock: I have lost a brother.
Kirk: I lost a brother once. Would you like to hear how I got him back?
McCoy: I thought men like us didn't have families.
Kirk: I was wrong.
General Korrd deserves a mention.
Personally I liked watching the growing bond between Talbot and Caithlin Dar. You only see them in the background most of the time but, they are awfully cute together.
Of course the mutual bonding between three seemingly incompatible groups like the Federation, Klingons and Romulans is something Gene Roddenberry always said was unavoidable.