Magic Kingdom: Tiki Room. Seriously. That was the best they could do in a refurb???
EPCOT Center: Figment. Pathetic. There's nothing "Disney special" or "WDW Magical" about this ride whatsoever. This is tied with "Mission:Space" simply because I'm sick of being put in front of a screen and being told "this is real." At least "Soarin'" looks realistic and has that fantastic musical score....
Hollywood Studios: Lights, Motor, Action. I hate this. I saw it once, and that was too much. Boring, noisy and it usually gets rained out in the summer. A big waste of space. It's also irritating that the playback on the video screens are so obviously not from the actual live performance the audience had just seen. Again, I feel there is no "Disney-esque" element to this attraction, whereas the old Backlot Tour was amazing.
Animal Kingdom: Oh man....probably "It's Tough to be Bug" or any of the carnival junk in Dinoland, USA.