The original question was—"what are the benefits to having children"... specifically, "what are the benefits [to me] to having children". That's what I'm responding to. "What do I get out of it" isn't the best way to evaluate having kids. You get something out of it, sure, but... it kinda misses the forest for the trees.

LOL. Indeed choosing to having children is arguably the most selfish decision one can make in their life.