I've done all the Stormlight archive and the shorts related to that, the first Mistborn, and am halfway through well of ascension and sunlit man. Skimmed Rithmatist and the first Alcatraz before the kids read them. Eventually I'll get through more, but I'm rationing/slow by doing it via audiobooks. I don't have a ton of spare reading time. I've only been a Sanderson reader for about a year.
Stormlight archives is an instant easy answer: Pattern. I very much would not be a Lightweaver, but he is my favorite. I really spend more brainpower than I should on the sketch of the running cryptic. They are definitely the coolest spren type IMO.
Yes! I actually play the big four, in order of skill level: Violin, viola, bass, cello. My kids each play a different one, so I have had to learn along with them (they all started young). That's where my luthering dabbling come in too. Being able to do bridges, soundposts, other minor repairs saves so much money when you have students in string lessons.
I like the violin best, but the bass is growing on me. Some of my favorites (like Misty Mountains) need those low voices to sound their best. They play orchestral and folk/celtic/bluegrass but I stick to session/folk/americana most of the time.
What do you play?