As with every Trek movie there are things I like and things I dislike (some of the things I dislike actually started in WOK)
What I disliked
Kirk's Son as quickly as he is introduced he is killed off. The whole thing just felt really cheap to me.
Saavik (don't care who is playing her the character doesn't work for me)
Don't like the hokey sci-fi in this movie and the way Spock was brought back to life.
What I liked
Sarek, I actually saw him first in this movie (not the TV series) and I was so impressed with his performance
I also liked the little we got Dame Judith Anderson
Spock's Katra in McCoy and the many scenes involving this (also McCoy's speech about not wanting to lose Spock)
The enterprise scene
The strong themes of friendship in this film. I am in the process of reading Nimoy's autobiography and he used this quote from Henry V to explain the themes of the film and I think they sum up the movie perfectly and it is this theme that I really love about the movie.
"We few, we happy few, we band of brothers, For he today who sheds his blood with me shall be my brother"