That is a very good question, I have often asked myself.
Before child, before therapy, before finding this forum, I thought there was something wrong with me for not wanting children, that I was the only one in the entire world. I even thought that people who didn't have children had very good solid reasons, like economical, environmental or were too pessimistic about the world, that I was the only with no other reason than not wanting them: pregnancy and birth were disgusting and kids far from worth the effort.
Having a child has helped me to know me better. I miss a lot of things, and I know I would have been happier with someone who shared my views, but then life is not always what you are expecting, it is also what happens to you. At least now, I know there was nothing wrong with me, I saved my relationship; my man, who, with other woman would have probably had at least one more child, is now more than fulfilled with our only child. We have taught him to be very open to others, so he stays alone with grandparents and babysitters, so that we can have some freedom. We taught him to sleep in his bed from the beginning, so he enjoys his bed and we our intimacy. I love my child more than anything (apart from dh) I just try to have space for me/us.
What would I do different? I tell myself, it is better to regret doing something than the opposite. With what I know now, I would have faced the pregnancy and birth with less expectations. I was told so often that everything would be wonderful when I saw the baby, that I felt awfully guilty for not feeling anything. I shouldn't have believed those voices and I shouldn't have pressured myself to feel things I couldn't feel. Curiously enough, the biggest mistake I did that I regret the most is being talked into trying breatfeeding. It was sooooo horrible, I hated it so much that I thing the baby noticed because it never worked. I gave up after just 2 days, but I have never been able to see my breast as something sexual. I was still expecting this f*** magical bond!!! I should have grabbed the bottle right away.