I believe in God because I don't believe knowledge is possible without a transcendent being. (e.g. the impossibility of the contrary) Otherwise you are dealing with infinite regress or axiomatic circularity. Materialism breaks down with origin theories. Metaphysics aren't substantial yet exist. Math and logic aren't descriptors of the world but integral to how the world is structured. The Orthodox view is that these principles are a reflection of the divine mind.

(I am an Orthodox Christian)

Because it sometimes makes me feel better about there potentially being some purpose to us if we were created intentionally, provides a placeholder explanation for what's out there besides the universe, makes life more fun, and does not harm anyone (I'm not religious).

I do not and i believe that religions are the number 1 problem in the world. The things people do for their "Gods" are stupid and cruel af

I do not, no proof. If there was a god such as in the Bible why give us reasoning abilities when they give no proof? And if so, then I put forward the idea that if there is such a god, they don't care if we believe so why bother?. Not to go all gamer but like the Sims, they made us and took out the pool ladder and saw what happened.

If there is a god that has such powers and cares, well fuck them cause they ain't helping us it seems. If they are well we're too far off course for it to matter, this playthrough is spiraling and it doesn't matter if we believe or not cause we may be circling the drain.

So seems easier not to believe because if you do it's more depressing.

For most, it's indoctrination.

If you look at it very very loosely, many major religions are reaching toward the same general concepts and have enough similarities to suggest a consensus that there's a "something" up there.

We probably all have an imperfect idea of what that "something" is, but there are enough similarities (or echos of the same ideas) across many religions to suggest they're looking at the same indivisible thing and interpreting it differently.

There are definitions of "God" that I feel are hard to prove, but others that are easy. For example, of your definition is "God is the ultimate cause of the universe" then it's pretty trivial that if everything has a cause there must be an end of the chain. Of course, this the could be a computer program running the universe simulation or even just the laws of physics themselves if those are truly causeless. But nonetheless, it's still a somewhat satisfying definition of "God" so I'm comfortable saying I believe in God. Harder definitions include "God is an omnipotent being" (which most of God's traditional attributes can be derived from) and "God is the being described in the Bible/Qu'ran/other religious text" which I feel like are unprovable.

A lot of religious apologists will make arguments in favor of the easier definition and then try to claim that this means their specific view of God is real. Personally I think that's insane. Like "there must be some end of the chain of causality therefore God became a Jewish carpenter in the ancient Roman Empire." Even if you're Christian that should be a bad logical jump.

Gods, plural. But believe is a weird word.

I commune with the ancient gods of my ancestors, whether I believe in them is complicated though. I spent most of my life atheist after the christian church failed to grab me. I learned of my ancestral religion from my great grandmother and my great aunt. Grandma was Catholic on paper but still recognized the old gods. My aunt called herself a druid.

I choose to commune with the old gods because I have to believe in something. I've felt the call of spirit, the gaping void in my heart where spirituality was meant to be, but I do not trust organized religion. I don't trust the churches. I don't trust those who would hold power, enforced by faith, over those who do not know better.