Maybe a more accurate poll would be, instead of "worst" attractions, "most skippable" attractions... I don't find any attraction at Magic Kingdom to be "bad" per se, but there are certainly attractions that, if I'm in a rush for time or if they have more than a 15 min wait, I will skip nearly 100% of the time... (such as Tomorrowland Speedway or Barnstormer) there's also a bias that I have having been to the Magic Kingdom a lot... so maybe I would say "most skippable for someone who has been to Magic Kingdom >5 times and/or has been on the attraction previously" (like Tiki Room or Carousel of Progress... both of those attractions are "must do... eventually" in my opinion, but if you have one day in the Magic Kingdom, I'd forgive you for skipping them... especially if you had already been on them in previous visits)