I am very childfree, can't stand being around children for more than five minutes. Had a vasectomy years and years ago. On the other hand, I am not necessarily anti-natalist, I don't begrudge other people wanting to have children for good reasons. For good reasons is the big caveat there though.

I definitely feel like I see more childfree people in leftist circles, but on the other hand I also see more folks who I think are prepared to be parents for good reasons and that would actually make good parents. As opposed to people who think it is their god-given duty to procreate or just do it "because that's what you do", which seem to be more common right-wing tropes.

Obviously that is generalizing to some degree, but just seems to be what I have noticed anecdotally.