I would say that Church existential is probably closest, as in, you become a church unto yourself. This is the default church for those who find nothing better out there, no truth that is greater than their own. Even with the demons and with your own problems and faults, at least it is the demons that you know and the faults that you have already learned to live with. Why should you go somewhere else and have to fight someone else's demons and deal with the faults of others? When we begin looking into religion we are immediately confronted with numerous lies, hypocrisies, and extortion through our fear of the unknown. So if we can't trust, depend on, or put our faith in anything else, then we default to faith in ourselves and in our own understanding. We develop a code of ethics that fits our lifestyle and works for us and we try to stay within the moral boundaries that we have set for ourselves and try to do good in the world as we understand good.

I tried that one time but I could never measure up to my own standards, much less those of others. I was constantly in a losing battle against those demons, and what I saw as true and good didn't always turn out to be so good. So I had to go out looking again, this time I looked a little harder and since I had already made a mess of things I was a little more motivated to find Truth. ;)