Everyone keeps raving about this author and this series. So I'm finally getting around to it.
First thing, I almost immediately quit, because I found Kelsier just that annoying. He seemed to lack empathy. He was a smug, condescending know-it-all who reminded me way too much of Richard Rahl from the Sword of Truth series. Because people assured me that this series is nothing like SoT, I kept at it, although I cheated on it with three or four other books, before finally finding some momentum and real interest.
I wasn't sure I'd like Vin, either, but she didn't drive me crazy like Kelsier. And she became a lot more likable as the story progressed and she grew as a character. I got quite attached to her and several of the others. Sazed in particular was very interesting to me.
It wasn't until more than half-way through that I was able to decide whether I liked this book or despised it. The issue was that certain characters, like Kelsier, had a very black and white view on things, and it rubbed me the wrong way. Those who disagreed were dismissed as naive. I wasn't interested in black and white. I wanted complicated and messy.
Ultimately, I was not disappointed. The last hundred pages kept me glued to the book, which is a bit of a challenge with how busy I am. I was happy with the conclusion in it. It gave some satisfaction while leaving just enough unanswered questions to lead into the next book. So, I'm glad I let myself get talked out of giving up on it.