I'd love to read more, and I'm especially curious what it would mean to you to no longer identify as a theist, and how that would feel.

It is a complicated feeling. It is hard to adequately explain without delving into detail explanations of (a) my particular beliefs (b) the society of friends and family I inhabit and (c) a heck of a lot of personal history. I am not ready to deal with all of that here. I suspect bits and pieces will leak out.

The one thing I will say now is that it would completely wreck almost every aspect of my life. I have everything invested in this.

I'm also curious about the last two:
Fear of confirming Theism and dealing with the social consequences

Since, at this point, I don't have much to think that critical examination will lead to me dropping Theism, it is still possible that it will strengthen Theism. I don't think it is more likely but I expect it would provoke a stronger reaction than my confession did.

Preemptive rejection of Rationality and/or Reality

If I really were scared enough to dodge critical examination I would be smart enough to drop anything that threatened a critical examination. As in, it wouldn't be given a foothold. I have enough power over my beliefs to choose what I want to believe. Right now, Rationality has my attention. If it scared me enough I would just leave and never return.

This hasn't happened and I do not expect it to happen. But if the situation were that dire, I would want to hold off on the critical examination until it was less scary.

For that to even make sense you have to give me the benefit of the doubt in terms of how I argue with myself. I don't expect it to translate well into other person's belief system. Also, it is very late... so... I don't promise anything and reserve the right to recant tomorrow. :)