Does God have favorites among the believers?

God reveals Himself, His secrets, and His plan to all who yearn and ask for that, without any favoritism .

The young boy Samuel, who gladly left his parents’ house and lived in the temple with a zealous heart for the glory of God, was considered worthy — unlike Eli the priest — to hear God’s voice and be entrusted with the secrets of God’s plan for His people.

86 St. Aphraphat, Select Demonstrations 1:14 (NPNF II/13:350).

And Moses the prophet , who “refused to be called the son of Pharaoh's daughter, choosing rather to suffer affliction with the people of God than to enjoy the passing pleasures of sin, esteeming the reproach of Christ greater riches than the treasures in Egypt” (Heb. 11:24–26) was considered worthy to witness the mystery of the incarnation in the burning bush (Ex. 3:2–4), where he was called to lead the people and receive the law, etc.

And since Isaiah's heart was full of zeal for the house of the Lord and His people, he was counted worthy to see the Lord God sitting with the train of His robe filling the temple. The Lord asked him who He should send to serve, and he answered, “Here am I! Send me.” (Isa. 6:8).

Paul the Apostle says of God — while in Athens among the philosophers — “He is not far from each one of us; for in Him we live and move and have our being” (Acts 17:27–28).