-Jerry Goldsmith's score
-Herman Zimmerman's production design
-Laurence Luckinbill's performance
-First appearance of more varied Klingon makeup/costume styles
-Yosemite always looks good on a big screen
I swear, this movie gave me the biggest headache when I saw it in the theater in '89. I can honestly say I've only watched it 3 or 4 times in all these years.