I am suprised to see this topic.
STII is the best movie in the seiries. Now I do think the STIII kills a lot of what was accomplished with STII. Not to say STIII is a bad movie but the "trilogy of II, III, and IV" is not great because STII addressed a lot of archetypes of honor, loyalty, age and experience, and friendship. Many of these are more or less lost in the next two movies. Spock's death is reversed, not that his sacrifice was any less noble. David dies before we get to know him and Savak is a huge disappointment as a character in the long term. Her version in STIII was literally another person as they abandon the Romulan aspect of her personality which was sad.