but I would have to go with Carousel of Progress if I had to choose. It was ALWAYS my favorite growing up and was the first ride at WDW that both of my girls rode this past Feb on their first day at the World.
Test Track/Mission Space or Soarin'/Journey into the Imagination
BOTH!!!!! I could only do a spouse one (my dream to go again since we went on our honeymoon) if we took care of a family one first sometime around the same time so I didn't feel guilty about leaving the children.