Wait until you hear a detailed explanation of the magic system for the 5th time. Still a good series.

I was just listening to a Sanderson interview. He's annoyed by it too. It's his publisher wanting the books to be easy to get into. He's dealing with it in Mistborn era 3 where's he's trying to figure out how to re-explain everything and it's annoying him because he just wants to show allomancers doing cool stuff.

Well I often forget the rules, so its useful :)