Am I? I think from a selfish perspective, I am making a huge mistake. I have no doubt that having kids is a lot of fun, which I will miss, and also when I get old, I will miss someone keeping an eye on me. (Technically, you don't need your own kids for that but our society is, for better or worse, structured that way.) And I hope next generation will be very slightly better off (less resource contention) because of my choice.
Also, to clarify another thread which is no longer there, I am not anti-natalist, but "anatalist" - I believe in personal choice in this matter. I also don't think anatalism is hereditary, but acquired from intellectual reflection of the world.