What does God need? Nothing!
What does he want? Nothing!
What does God require of you and I? "To do justly, to love mercy, and to walk humbly with him!"
If you don't believe me, read it in Micah 6:8.
You see, God is complete - God lacks nothing and wants for nothing, but God does ask things of us. We can turn to the Sermon on the Mount (Matthew 5-7) or the Ten Commandments to see what God requires of us, but I feel that Micah 6:8 is a powerful summary of all that God asks.
Read it again. It is not as easy as it first looks. Justice Love Mercy