Big fan of Sanderson, but either his humor is getting more juvenile in each new book, or it's just me aging.
For example, reading Wind and Truth, the latest Stormlight book, there is (or maybe are more than one)... poop jokes. This is in an adult fantasy novel series. And the banter between the characters has just gotten so much sillier. In the Lost Metal, there were fart jokes. I mean, he has YA books, so I don't understand why jokes so juvenile are in his adult series. It really does pull me out of the narrative, and not in a good way.
I just don't think Sanderson does humor well, despite his other strengths. I don't remember the humor being so silly even in his earlier books.