Parenting is like being an NPC in that magic of childhood. You get to live through that again, just not as the main character. I imagine that starts again as a grandparent, but I'm not there yet.
Yea I recognize that this is for some people one of the biggest draws to having children. I admit that it would be nice to get to "relive" childhood even as an NPC, but since I wont be having children this option (to solve "is this it" feeling) isn't even on the table.