which one do you prefer? having kids or no kids? and why??

I've known since I was young that I don't want any. This was only reinforced after I adopted a kitten last year, regretted it to the point of depression after about 2 months, and adopted him off to someone else who I trust. I realised I absolutely don't ever want that kind of responsibility again so a human life would be infinitely worse of an idea. this is on top of terrible genetic health issues that I wouldn't want to force onto another existence.