A lot of my friends don't like Kell all that much either, so I force them to read SH. I think it portrays him in a light that shows him for what he really is.
Oh my Shards, yes. I read that part at my Grandparent's house last summer. I was just reading peacefully on the couch and then all of a sudden, "NOOOO!" My aunt, my mom, and my dad all love the cosmere, but I was the first one to read it. I had to be silent about it for months and that was extremely hard.
Funny story, yesterday I was on the bus with two of my friends. One of them was about halfway through WoA, and she and I talk a lot, so she already knows plenty of what happens but there are still little secrets for her to find out. The other one was almost done with WoA, but we don't talk a lot, so we were discussing stuff while we had time. Specifically hemalurgy. Anyway, all of a sudden, my other friend says, "Then why aren't earrings hemalurgic?" Trouble is, I can't hear her very well and all I know is that she might be spoiling something, so I literally slapped her. I actually felt really bad, even though I didn't slap her hard, but we laughed about it and now she knows. But the other friend doesn't so it's a success!