As someone who isn’t the biggest fan of Shallan, I really did enjoy her flashbacks. I think even more than most of Kaladin’s tbh. Though Dalinar’s were a different breed.
My favorite is The Way of Kings and I finished it in about 6-7 days. I think Words of Radiance took me 2 weeks. As for Oathbringer, I just finished it and it took me like four months lol. Planning on starting Rhythm of War tomorrow.