The Magic system. The world Sanderson created uses Spren as a form of magic of sorts. A spren is sort of like a spirit, or to borrow the books definition, a spren is a physical manifestation of an idea. Thought given form. There are different kinds of spren, honorspren, fearspren, angerspren, etc.. there are also spren based on nature, windspren, stormspren, etc. And the people who can interact with them have special abilities, a person who has a contract with an intelligent spren becomes more or less a Knight Radiant. A Knight Radiant's skills are varied, from flying in the sky to creating illusions. This magic system may sound familiar to those who've read Jim Butcher's Codex Alera, Sanderson's magic is a lot more complex though.
The Setting. It's Level: Final Fantasy. The Stormlight Archive world feels like something you'd see in a JRPG. And I wouldn't be surprised if Final Fantasy had an influence on the author, Sanderson is an MTG addict, or so he claims in his website, and he also listens to Nobuo Uematsu... so yeah, the guy's a nerd.
The Characters. I fell in love with Lift, a character who was introduced in this book, who happens to have just one chapter. She's a 13 yr old girl thief. She breaks into rich people's houses not to steal money, but to steal their dinner. Because rich people have good food. In her chapter, she breaks into the royal palace. She is just too awesome. SZETH SON SON VALLANO!!!! A super saiyan version of battousai the slasher. Seriously, this guy is too bad-ass. Wit, a mysterious smartmouth, nobody knows what he's up to, he seems to be more or less on the side of good though, and his powers are a mystery. Jasnah Kolin, a genius who wants to save the world, sister of the king, a woman who can turn you to ash with just one touch. Tarvangian, a kind and gentle king to the outside world, he is king to a kingdom known for it's healers, he also wants to save the world, and he'll do anything to do it, including murder. These people are just supporting characters though, at least for now. The main characters are even more bad-ass.