Anecdotal Evidence

[bennyboy]

Occam's Razor speaks of not multiplying entities beyond necessity. God is an unnecessary entity. Cut it.

It depends what you're trying to explain.  I think with regard to ontology, the simplest position is a shrug: I don't know, so I won't assert.  If one insists on debating ontology, then one must introduce SOME unnecessary term or quantity, since the simplest position is that existence was never created, and there's nothing to explain, and the debate implies that that simplest position has been discarded.

At that level, the God idea serves as a kind of placeholder for paradox: the creator which need not be created, the singular which allows for infinity, and so on. Whether "God" is the best term for that philosophical quantity is a matter of opinion-- but so long as we're not talking about Sky Daddy, positing a philosophical "being" isn't really a problem for me, since it can be taken, in varying degrees, literally or figuratively.