The Answer: To Put His Glory on Display
The question posed is: "Why would a perfect God bother to create this universe?" This answer would undoubtedly be insufficient according to Peter down below. He's an intelligent, articulate atheist & I find watching his posts (sometimes rants) help me to think more keenly about my own beliefs or ability/inability to express those beliefs. Here is a good reason why we should speak of God as the Creator/Warrior/Almighty/Holy/King He is, & not as a love-sick teenage girl with an incurable crush for you: