It is funny that god is a language, but he lived alone for the eternity. Was he communicating with himself alone?... Just another "mystery" that believers will sweep under the rug.
What's more interesting is the comment you're replying to actually describes the super-personal nature of God - what Christians call the Trinity. Writings expounding on the Trinity have filled many volumes of Christian theology - it's something far from being "swept under the rug".
As for believers, you can see from this thread that there are many interpretations of God, but on HN they do lean toward the fairly abstract.
Personally, I see our mere existence as proof of God. We can observe God because we are God.
The only thing I've ever really been hung up on is the question of whether God can observe himself to validate his own existence. It's fairly paradoxical.
This is the god of Spinoza. A god that is everything and everywhere is, at the same time, nothing. It is nothing more than the worshiping of the universe.