One quest line I thought was a lot of fun took place in the Valley of the Four Winds with Master Bruised Paw.
He is a master fighter located in Paoquan Hollow who helps you train. You must pass the Trial of Bamboo, Wood, and Stone to train with Master Bruised Paw.
All the quests were just a lot of fun with cut scenes of your training with him which were great.
For one quest he made me gather a ton of eggs which he then threw at me. I didn’t think that was very nice
Below are a bunch of screenshots I took while training with him.
I learned a lot of great moves from the master!