Hmm... I think the most disappointing themed ride that I have been on since it was in a major park that should have done it right (and I know a lot of folks are going to disagree with me here) is Ripsaw Falls at IOA. While it is a very fun ride it looks like they ran out of money for the story and theming about 1/2 way inside. Tons of exposed steel girders, lack of paint and anamatronics where they only made 1/2 the body complete the effect. I guess it just contrasts so harshly with the rest of the park it stands out.