God has a personality, since he is the source all personalities. In fact:
Without God and except for his great and central person, there would be no personality throughout all the vast universe of universes. God is personality. (28.4) 1:5.7
We take his gift the pattern of personality, and over time (on Earth) quickly make it our own. In this sense, I think, we partner with him and a fragment of him is a part of us. On reaching our first moral decision, the Thought Adjuster comes to reside with us, and should we be so lucky, one day we’ll fuse with the perfected Adjuster.
As for God’s personality, it is infinitely more than what we understand as personality. It’s even more than our highest concept of super-personality. The infinite part is a mystery, but for me it’s sufficient to know that God is a person, and can be personally known. I can develop a relationship with him right here, right now. No third-party needed.
… he is truly and everlastingly a perfect Creator personality, a person who can “know and be known,” who can “love and be loved,” and one who can befriend us; while you can be known, as other humans have been known, as the friend of God. He is a real spirit and a spiritual reality. (28.5) 1:5.8
My Urantia Book Index 