One: BODY WARS!!!
I LOVED this as a kid! My mother hated it cause she thought it was a rough ride, but I had a blast with it. I also felt like I was a student on the Magic School Bus on the episode when they shrank themselves to go into a body. I thought that was so cool! I love learning and having fun! It's a shame that they took down =(
The half would be that I'd like for them to bring back would be the old Imagination. (I consider this half since the ride is still there, it's just the horrible upgraded one)
I REALLY HATE the new one of Imagination and I'm sad that the fun room with the glowing lights on the cool carpet is gone. It was a room you can go to that was near the gift shop you walked into after the ride. I LOVED jumping on the moving lights as a kid and doing all those fun things. Oh to be a kid in the 90's again...