why did God make the world

Summary: "God made the world because he was happy."

Why did God make the world? A friend of mine said that there were many theories on that subject. I should ask about them. But here's my take.
First of all, the question is enlightening. If we figure out why God made the world, we know why we exist, how we should look at the world, what is most important about it, etc.
Now, why on earth would God make the world? He doesn't need to be glorified, he doesn't need to be happier...I suppose it might be boring, but I doubt it. He exists out of time, he doesn't have the time to get bored.
There is no need to make the world - at all. Nothing. There is also no reachable goal for which to make the world. To glorify God, yes, but we only give God a finite quantity of glory, so what's the point? You follow me?
I think God was just happy.
Existence was already beautiful, but what the heck? Why not make more?
This sort of makes emotion superior to everything else. Hm. I'll just stop here on that thought.

I wonder if God will be satisfied with just making one world. But I suppose we will live forever in heaven. Would we feel cheated if he made more worlds? I don't know. There are multiple people on earth...