I love the ToT pre-show, it tells the backstory and sets the mood. That said, I used to love 5-10 years ago when they had evening EMH that weren't very busy and they would have one library running the pre-show and the other open so you could just walk through. Allowed me to get 6-8 rides in a row in a pretty short amount of time. HM is another one I really enjoy. Overall, I think the pre-shows add to the enjoyment of the ride. FoP is one exception for me. That two room pre-show just seems slow and annoying.