oooh, i've asked myself this so many times! my biggest 'problem' though, altough it's not exactly a problem, it's more of an inner debate sort of thing, is when i say what i think, when i think it, why i think it. i've been told i overthink everything, and, well, he always laughs when i tell him everything but it creeps me out, because i don't analyse everything that happens inside my head to everybody.
on the other hand, i haven't connected my 'fessing up to everything' with religion, i never was raised as a religious person, i just think that by explaining everything [even when he knows it, because most of the time he knows what goes on inside my head], i won't have to pretend that something else is going on: it's much easier for me to say: half of me likes this because of this, this and this, and the other half feels like that because of that, that and that. thus, he can make his decisions taking into account both parts of my head.

i know, sounds weird, i'm not sure if it makes sense, but thank you thrall for this topic!