For UC1 i would say where you are in the cave and you have to go through the little ride to get out at the end, and all of the diolog is BORING!!!!* I also thought that the dice monkey was really annoying!!
for uc1 i agree about the cave and the monkeys and for UC2: it would have to be when you have to break down the barrier blobking that evil girl from the shirogane clan... or the missions when you have to collect stuff, kill monkeys, or th defend the 10 gates one