Slow to Anger
I've often thought of why God is "slow to anger", and have actually felt it would be better if he were to get angry fast so that we can the faster know His displeasure and correct our ways. But I have recently had some revelation on this issue.
God gives us time to use the opportunities He gives us. He gives us an instruction, such as to end doing some sinful thing, and then He gives us _time_ to get acquainted with the thought and do it.
God wants us to succeed in life and in following Him, so He patiently waits for us to learn the lesson He has taught us, then gives us time to recuperate before giving another instruction.