What you do like is a combination of suffering with benefits. You like suffering when it makes you stronger. I call bullshit and say you like becoming stronger, and you'd do away with the suffering if you at all could.
And what good is the being stronger anyway? It serves only, maybe, to avoid or diminish future suffering.
I'd go so far as to say that what you like is short-term suffering if, and because, it helps you avoid long-term suffering. You "like" the pain you feel when you put your hand on a hot stove because you can use it to know you are about to burn your hand. The pain helps you avoid more pain.
How about if you could know you are about to burn your hand without feeling this pain? How about if you didn't need hands at all? You see my point? The benefit of "not burning your hand" is only a benefit because the alternative is worse. You can't win, you can only minimize your losses.
Don't get me wrong; I like life most of the time, and I have had these "simply beautiful" experiences you describe. But that is no justification for forcing other people to live. Because that is what my comment, though unclear on this, was ultimately about: no more kids. For anyone. Ever.
Once you are in life, you are guaranteed to suffer, and you need hands, and all this wisdom about not being able to have your cake and eat it too, learning to enjoy the simple things (i.e., be complacent), the world not owing you anything, et cetera. But these things are not relevant to the question of whether procreation is acceptable.
I will consider your suggestion. I like to believe I already suffer my fair share for worthy causes, but I may be wrong.