Let me answer with another semi-rant then:
The fact that humanity is a total disaster to the planet and that I'm a part of this is frustrating, but it doesn't get me depressed (anymore). I'm enjoying my life while trying to treat the environment with respect. I don't consider raising children enjoyable. Even if I did: The fact that there is a history of inheritable neuroses in my family that ruined my mum's childhood as well as mine would keep me from having children. No need to take the risk and screw another generation. Because that's what got me into a severe depression years ago that I am still working on. You see, there's more than one reason for me to not want to have a family. Give me guinea-pigs and dogs instead!