Well, Warbreaker is a good standalone novel that has a magic system involving breath and color. The Emperor's Soul is also a very well written short story that won him a Hugo. But if you're looking for a series then I can't recommend Stormlight Archive enough, it's his best work yet. It's still not finished (with 4 books out and the 5th one coming next year) but of all the fantasy authors, I'm least worried about Sanderson finishing his book series.