Thanks for the welcome!
Lol, I'm not that fast either, my fastest on 3x3 is 14 seconds, but my average is around 30 usually.
Not much yet, my time here will be short, as I'll be leaving on a mission in March, so I kind of joined on a whim, but I might share some of my writing and worldbuilding for critique and offer thoughts for others and also talk about Sanderson in general.
My favorite questions to ask are: On a scale from one to ten, what is your favorite color of the alphabet? If being up for something and being down for something both mean you want to do that thing, then what is the proper vector state for not wanting to do that thing? I also ask people 'what is up', but they always start telling me about themselves, can't a man just get a straight answer on the definition of up???
I love all three and how they mingle with each other, but honestly I might say either Feruchemy, because of how balanced it is, or Hemalurgy because of the grander Cosmere implications of what it means to take pieces of someone's spirit web and add it to your own.