Talking about God's feelings is rarely a good idea.
On the one hand, it is challenging and dubious. Challenging, because we cannot know the mind of God beyond what He has revealed to each one of us in His word. Dubious, because God does not have feelings as we have feelings. He is not fickle, emotional, persuaded, reactionary, or spontaneous as we are. He is the unchanging God who exists outside of time, ordaining all things according to His will alone.
Yet, on the other hand, God certainly has affections. In Scripture we see Him express joy and grief, pleasure and anger, gladness and sorrow. He is personal, and He has chosen to relate to His creation personally. Prayer is perhaps the most tangible way that His children can experience His personal nature, as He hears us and responds to our needs.