What do you like about the writing style of this fantasy and science fiction writer?
I love the magic systems he creates. They are so in depth and unique.
Are they at all like the final fantasy magic systems?
He tries to structure them around many rules and limitations to make them interesting. For example, allomancy requires the user to ingest specific metals. Each metal allows them to use a specific type of magic (push/pull metal, alter emotions, etc.).
I see, that's interesting.  Like for instance Waxillium Ladrian pushing on metals.  Could you tell me more about Feruchemy?
It's the second magic system in Mistborn. The user can store certain attributes inmetals they are wearing which they can then tap into later when they need them. For example a character could make themselves weak for a period of time while they store strength and then be able to use super strength for a brief period of time when they needed it in the future
Huh, I see so that makes it as though the users are less all-powerful than in a more typical fantasy world, I can see how that would lend itself to interesting storytelling elements.  They can't always count on having the skills they need.  What do you think of the other kinds of magic in the books?
He always tries to put an interesting twist of whatever magic system he creates. But he always follows rule 0 of Sanderson's Laws: always ere of the side of awesome :)
Yes, and of course rule 2, limitations are greater than powers in order to make trials truly trying.
I find that characters which become too powerful are less interesting.