Implications of our existence

If God a sentient and conscious being who created humankind in his whimsy, or as a part of some selfish reason, such as for his own amusement, it is not likely that we are of much consequence to him. Picture, for an example, an artist who is able to draw comic characters that are virtually identical each time he draws them. He can draw one and discard it, knowing there is potential for another just like it at his fingertips. Imagining God as that sort of god can only leave one with a sense of despair. In such a scenario, our existence as individuals is but transitory and fleeting and expendable -- important only in our own mind and, if we are lucky, in the minds of a few close friends or relatives. For a god who has given mankind no purpose, man can serve no purpose.

Why would such a god as this create a creature like humans, who can think and act of their own volition. I can't think of any reason right now.