How open are you with your writing? Do your friends and family know that you write/have written a book? Do you use your real name when publishing?
My circles know I write, a few know I am self publishing a book and only my immediate family, the guy doing the cover of my book and a friend helping with the web end know I have a pen name.
I don't think I am afraid of criticism or people hating my books. I know everyone is different and likes certain books, but I want to wait until I get "Lane Changes" book 1 up on the Internet before I post it to my Facebook and Twitter feeds. Before all my other friends, acquaintances and those people from-high-school-you-have-on-FB-and-wonder-why-since-you-don't-really-talk-to-them-anymore find out!
Best of luck in writing my friends!