Data's story is like that of Pinnochio. He wanted to be a real boy because it was something he wasn't. We all want to be something we're not because we think that life will be better that way. What Data didn't realize was that he was perfect the way he was. I think that if he had succeeded in his endeavor, it would have destroyed him as a person. I can't imagine him as a real human. I think it would be slightly awkward.