If you're going to talk about God as portrayed in the Bible, those examples you named don't always work. God can lie, as he told Adam he would surely die if he ate the fruit. Adam didn't die, he lived on to raise a family. God can fail, as he is always correcting errors in ways like flooding the world or destroying entire towns. Also, an obscure passage about "chariots of iron" comes to mind.
In the aspects to your response, God told Adam he would die:
Three possible reference to what God meant:
1. Spiritual death of the connection to God verbal, as in the garden.(God's verbal communication spiritually was severed, making it different for God to walk around and talk with people)
2. Immortality lost, eventual death as a result.(look at the life expectancy it has deminished tot he age of 120 years as of the flood.)
3. Foretelling that Adam and his descendant would live only to bring death and destruction. (Which we see as a result of the timeline before the flood).
God is not imperfect in that he sins, but rather imperfect in that he is blind to only see the good in people. Unfortunately God is split personality: The father is represented in the Old testament as the father that natured, cast judgement in the form of strict punishments of daily and average mistakes. While the New testament, has a seperation between father and son, so two distinct personalities are present. That of Jesus Christ, a humble child, and that of the Father, the overlooking parent that steadily pressures and reassures Christ of his tasks on Earth. The Holy Spirit was present in both characteristics in that it gave views of heavy regret, judgement, etc through the father and son, while upon the people they interacted with.
The only example to explain this is to imagine three voice, distinct personalities, that are speak different concepts or views of the same situation. These three voices speak with different tones, placing importance on specific positive and negative externalities of life. The result is that one is domininant at times, with the brief whisper of another personality in their voice. So you have God the concerned father, with the brief whisper of judgement from the Holy Spirit: (as seen in the story of Cain and Able).The dominiant judgement figure of the Holy Spirit overpowers the concerned father during the Flood; but brief moments of mercy arise from the father to save Noah and his family. The seperation of God the Son from the trinity results in the inevitable distinction of Christ's personality. It allows Christ to pled for his life the night before he would be tried after the Mount of Olives. While the firm and strict hand of the God the Father and Holy Spirit.
In turn it is not a question of whether God lies or steals, or is prideful. It is about the struggle of the sub-conscience pysche of God's three distinct personalitys and their contridiction and agreement of their deity.