My favorite part of having my book being read by people is hearing that they've talked to others about reading it. I've had that happen a few times now (again today at school), and it means more than someone just saying that they liked it. It shows that they liked it.
My second favorite part is when people tell me how quickly they read it. I've always thought that my book is a quick read and I wanted to make it that way, but it's tough to tell with your own work.
So, if you've read my book and enjoyed it, please tell others about it. And then, tell me you've told others! :) If you didn't enjoy it, just smile and nod at me like you haven't read it. That's always good, too!