I vote for Buzz Lightyear's Astro Blasters. It's a great concept, but should not have been done with more cartoons.
Why does everyone hate Rocket Rods? The reasoning behind replacing the Peoplemover was that it was getting old and unpopular. Every time I saw that ride working, there were like 2 people in each train. Peoplemover lived 28 years, and in Tomorrowland, we need to expect progress. I thought Rocket Rods was a fun ride with cool noises. If only they'd made it higher capacity (shortening the lines) and actually built a track for that ride, it'd be AMAZING and still working.