Do you ever doubt your atheism?

[Mudhammam]

You don't simply mentally masturbate. Before you present an argument to someone you collect data that is established, you test that data with control groups, then you turn your findings over to independent sources to see if they come up with the same answer. If they do, then you are onto something, if it is knocked down, you start over and try to find the error in the data or methodology.

Vagueness is never a way to start thinking.

It's called 2,500 years of deductive philosophy. Whether or not you agree with the conclusions reached by a number of rationalists who use common sense, practical logic in extension to arrive at this vague notion of God doesn't even remotely imply that they started with it.

"Ideas must be distinct before reason can act upon them" Thomas Jefferson.

You have tons of competing claims about what a "god" is and no human to this date can empirically prove even the necessity of one. Science on top of that is pointing away from a god.

There are a lot of things you cannot prove empirically that you take for granted or rely on from necessity. The "soul" or "self" is perhaps the most obvious. Empiricism requires certain assumptions to even get off the ground (such as that the Universe is structured so as to make rational understanding possible). Your comments about verification suggest you don't really understand the arguments people have used to justify belief in a god (considering that an entire school of thought places concepts above percepts, God being objectively known by the former, so they claim).

What ifs in science are thought out and reasoned backed up with prior scientific method.

I would simply take the most likly answer which is people like the idea of a god and make them up for a placebo comfort to avoid facing their finite existence. Psychology and even neurology and biochemistry and evolution explain to a much better degree how humans can make bad claims and come to bad conclusions.

If the idea of god is in fact as effective as a placebo, and its universal appeal suggests it is, then it deserves our attention whether or not we believe it possesses an iota of truth about any alleged ultimate, objective world.