Who played the best Saavik and why?
I say: Kirstie Alley, by miles.
Written as a Vulcan/Romulan hybrid (the lines stating it were cut for some reason), she tried to hide her emotions but wasn't very good at it. Fiery, likable and colourful.
Robin Curtis' Saavik, written as a full Vulcan, was pretty much a zombie. No fire, no charisma, no nothing. Waste of a great character.
I'm really glad they changed Saavik to Valaris in STVI. I couldn't see either of the Saaviks as traitors.