How did you derive your moral code yourself? Any action you take has side effects in the outside world, and so some minimal, common understanding of morality is necessary for any beneficial interactions with the world and especially other people (I'll leave God aside for a second). Did you rely on the authorities of non-theistic moral authorities in the past, and if so, how did you examine the bases of their moral beliefs? Were you just relying on personal feelings and maybe some experiences? Did you discover the joys of hedonism?
I want to understand.
Edit: looking at some other comments, it seems you might be referring more to "fire and brimstone" preaching? I never experienced that growing up, despite being on the conservative end of mainline Protestantism and still practicing today, so I can kind of understand the reaction.
I'm still curious though.