I voted for The Savage Tide. I loved the other two APs, especially The Age of Worms, but the third AP definitely benefits from the experience gained publishing the first two. The adventures are definitely better connected in terms of story, foreshadowing, and characters than the previous APs; they are better supported by the accompanying Dragon articles (i.e "Savage Tidings" and "The Ecology of the Isle of Dread"); there seems to be a lot more variation in the types of adventures and encounters; and The Savage Tide has a very distinct feel from the standard D&D experience which I love.