Most of our dogs were perfect just the way they were. They didn't have any flaws I couldn't live with. Only one dog never seemed to outgrow chewing everything. Another never outgrew the need to run off. They were the only two dogs we had to find other homes for.
One of our four current dogs needs to overcome her jealousy of our newest addition. We are working on it, but will never part with either of them. The airhorn works wonders. We don't even have to give it a blast - just hold it in our hand and she stops the attack.
Actually most of my dogs little flaws seem to be part of his personality. I don't think I'd change much. I would like to have him happier when left alone, but other than that, not changing a thing!