Hello!
I just recently joined this site, and I have become a Cosmere fan over the past year. My sister recommended Mistborn last summer when I needed a new book to read. At one point I had a copy of it but never actually started reading. It easily became one of my favorite books/series. The characters, world building, and story were phenomenal and I was eager to read more of Brandon Sanderson's work.
I then began reading Stormlight after the Hero of Ages, and had the first two done in a couple months. Before Oathbringer, I read Secret History for Mistborn, Mistborn Era 2, and the first book of the Wheel of Time. I finally finished Oathbringer and I already can't wait for book four (and Wax and Wayne 4)!
At this point, I haven't read either Warbreaker or Elantris, but I'm nearly ready to start!