In the beginning, God created the heavens and the earth. The Earth was formless and empty, and darkness covered the face of the depths. And the Spirit of God floated on the face of the waters. If Isaiah were surprised at the power of God to create, name and hold every star in the sky he could see, what would his worship be today if he were shown that the closest stars in his sky, Alpha Centauri and Proxima Centauri, are 25 million million miles away, and that what he was seeing in His sky Nocturnal was a small portion of our galaxy that has one hundred billion stars, and that beyond our galaxy are there millions of galaxies? A second frequently raised objection to the concept of God's creation through evolution in relation to the Bible is that the Darwinian account blurs the distinction between humans and other animals, while in Scripture humans are a distinctive and special creation.
Human creation by God is not distinguished by any specific Hebrew term that is not also used to describe the creation of animals. Because creation was subjected to futility, not of its own free will, but by the one who subdued it, in the hope that creation itself will be freed from its captivity of corruption and obtain freedom from the glory of the children of God. The biblical creation holds the Bible as the account of God as an eyewitness to the real events of creation, since God was the only one who was there to observe what happened from the beginning. So the first and most basic statement we can make about why God rejoices in his work of creation is that creation is an expression of his glory.
It seems to me that creation praises God simply for being what was created in all its incredible variety. These statements about why God delights in his creation are not really separate reasons because they overlap so much.