Did Rashek use the Well or a bead of lerasium to become a Mistborn?
He didn't know at first, I told him there were interviews with him saying both, and he eventually answered with "I'm canonizing it as he used the Well".
If a person stores a lot of Investiture, could they resist a Shardblade?
This is theoretically possible.
Can you use Hemalurgy to power machinery?
He was initially confused as to what I meant, so I said I got the idea from thinking about FTL travel, and he said that it was a RAFO, but that I was thinking along the right lines, there needs to be a merger between magic and technology.
I read recently you sold the rights to the Mistborn movies, was that a purchase or an option?
It was an option, no purchase has been made yet.
Do Gasper Ferrings and Surgebinders holding their breath use similar mechanisms to hold their breath?
It's not the same, but it is similar.
Were the Edgedancers sort of like social workers?
He laughed at this question, and said that was sort of accurate, but they were more like good Samaritans than social workers.
So for Kaladin's depression and Stormlight's healing abilities, does Kaladin remain depressed because of his view of himself, or is it a limitation of Stormlight's abilities to heal, or something else?
Disorders like depression are a part of a person's personality, and thus aren't diseases and cannot be cured. He talked a lot about this, and he talked about how a hyper kid annoys people but that doesn't mean there's something wrong.
Is a Shard's influence of power based on Physical distance, Cognitive distance, something else, or does it vary from Shard to Shard?
It varies, but is definitely more Physical.
Of all the published shardworlds, which one is your favorite to write and which would you want to live on.
One he wants to live on would definitely be Scadrial, because they have running water and electricity. Favorite to write is Roshar. He would not want to live on any of them though because they don't have internet or delivery pizza. (He later stated that delivery pizza would likely be a thing Scadrial would get, but that it would not be delivered via Coinshots because they were too expensive)
