When you have a dream where you meet Hoid, and he's about to tell you all the secrets of the Cosmere when your uncle wakes you up.
I'm not very happy about that...
Also, I'm just going to throw this out there, he is AWESOME!
So is Kaladin, and Lopen, and Renarin, and Vin, and Elend, and Wayne, and Rock, and Kelsier, and Raoden, and Nightblood, and Vasher, and Silence, and Syl, and Lift, and Wyndle, and Legolas, and I'm going to leave now.
I am too emotionally attached to fictional characters.