The very first mistake in finding the perfect one is that we demand from person too much, much more than from ourselves. The second is that we lose many chances for good relationship because we arent interested in people who are a little bit less pretty. They have valuable personalities as well, we just have to try to get to know them better. And the last one. I agree with the concern that nobody is perfect. We are able to find anybody if we will give the feeling first. Love is about giving not taking, so if we will "send" to anybody perfect love, we will be given perfect one in return.