I've been agnostic for a year and a half. Five years ago I was a born again Christian. It took about a year to pry myself apart from the idea of a personal god, and it was a bit of a bummer.
My father is an ENTP and has been Christian for 10 years or so. In discussing God, he's said a couple times that he could go back to being atheist and get along just fine (ie. he doesn't believe simply out of need). I've always been taken aback by that comment, as my own transition away from religion was slow, vaguely painful, and punctuated by moments of existential horror. Being so close in personality to my dad and differing so much on this point makes me think that spirituality/religion/"the meaning of life" is much more important to the NF than the NT. Of course, I'm aware that this is a gross generalization, but I'm throwing it out there anyway.