When God's prophets "saw" God, it was through a revelation or a vision or through angels speaking on his behalf.
In the transfiguration all three of the apostles "saw" the glorified Jesus speaking with Moses and Elijah, yet these men had been dead for centuries. The ancient Jews had no belief in life after death, so Peter naturally thought that they had been resurrected and wanted to erect tents for them.
Never has God appeared "in person" to any human, even though it may have seemed that way to some.....and for a very good reason. We are speaking about a being who created all the suns in the universe, our own being rather small in comparison to others, which are gigantic by comparison. We cannot gaze at even our little sun without doing damage to ourselves.
When Moses requested :
“Cause me to see, please, your glory.”
God replied:
“I myself shall cause all my goodness to pass before your face, and I will declare the name of Jehovah before you; and I will favor the one whom I may favor, and I will show mercy to the one to whom I may show mercy.” 20 And he added: “You are not able to see my face, because no man may see me and yet live.” (Exodus 33:18-20)
A face to face encounter with the Creator would mean certain death to a mere mortal human.
Yes, the Creator presents himself as someone humans can relate to because he wants us to identify with him as a father figure. God has no gender, but is always spoken of as male. He does not have a physical body, but speaks as if he does so that we will see him in human terms. He is our literal Father as the one who caused our birth, giving all living things the power to reproduce. We are made in his image, possessing his qualities, so he has given us the power to recreate life, passing it on to the next generation.
The apostle John clearly stated that
"No man has seen God at any time; the only-begotten god who is at the Father’s side is the one who has explained Him." (John 1:18) God's closest companion, his firstborn son, came to earth to give his life for mankind and to "explain" God to his disciples. He did a wonderful job, representing his Father perfectly. Its a shame that the Pharisees didn't think so.
For the reasons stated above, it is our best interests that he doesn't reveal himself directly. But through his angelic representatives, those with a special role like Seraphs and Cherubs take on special service. These are powerful, high ranking angels who are always seen in visions as attendants around God's throne, upholding his Sovereignty. There is one who ranks highest of all and that is Michael the Archangel. He is their Commander and chief.
When angels had messages to deliver to God's earthly servants, they materialized in human form. That was because God's people were forbidden by Law to communicate with spirits following the flood, when demon angels materialized human bodies for their own wicked purpose. Being unable to materialize again after the flood, demons use spiritism to mislead mankind, so all forms of spiritism were banned. (Deuteronomy 18:9-12)
God is a spirit and he dwells in a spiritual realm, unseen to humans.....but certainly not unknown by them.