I've said it before and I'll say it again...they are all worth seeing at least once. After you have seen it once then you can decide whether or not to visit it on subsequent trips.
After 18 trips to the World, I would have to rank them in the following order:
CoP
Country Bears
HoP
Tiki
That is based on number of repeat visits to those particular attraction. I usually go to CoP and Country Bears on every trip. HoP, on average, maybe once every other trip. Tiki (the old) every trip, Tiki (the new) only once in a while just to see if they have turned the sound down to a non-painful level. They haven't yet. My point is that everyone's tastes are different. What one person hates another thinks of it as there favorite. See them all.