Well my answers are probably going to be unpopular, but I am going to use the two attractions that I have the best memories of from my trip in 2000.
Favorite park - Animal Kingdom (needs more rides, but I love the theming, the atmosphere, and the animals.)
Favorite ride - Test Track (it is kind of thrilling, but my mother was able to ride it, it had very apprpriate theming for its subject, and it was somewhat educational.) Overall, the ride was just plain unique and fun