Hello Honorless,
1. You are correct about The Kingkiller part - Big fan, losing hope tho.
2. Favorite book: The Way of Kings - as I mentioned it was my first experience with Sanderson and was also a gift from a special (to me) person.
The book was one of the best gifts I have ever received and still have one of my favorite book climaxes.
3. World: I will cheat a bit because I am going on nothing solid, however, I feel that my absolute favorite will be Scadrial in the 3rd era. I see so much potential in it and I know I am going to love it.
4. Magic: Full blown Mistborn - I can see how my life will be a lot better and convenient.
The one that really sticks with me is the ending of book one - it was the middle of the night and I was screaming and cheering on for Dalinar and Kaladin and was so exited and happy by the end. Still am to this day.