I don't really expect people without children to understand what I mean about not everything being about me/us and my/our needs, but by definition children do need so much love and sacrifice.
In terms of finding things in common, I found I lost most of my single childfree friends when I had my first child they just did not understand I could not go out in the evenings as I was breastfeeding, or on holiday as I didn't want to leave my babies and we just drifted. I would often get the impression they resented the babies, and just wanted me to get shot of them. Motherhood is not an opt out, and I didn't want to leave them in the early years. We were having completely different lives, and those differences became wider as the years went by. I am just being honest about that. Had they adored babies and enjoyed being with us, then maybe it would have lasted but they didn't, and nor should they have to pretend. I was too tired to go out for dinners in the evening, too exhausted even to call in the baby days. There was no time.
Now most of my friends have children of their own, we all in the same boat and it is easier.
I can't run off a list of negatives, as I suspect many pp would prefer, because for me at least there were none to have dc, but I know parenting doesn't suit everyone. It is up to you, and there is no need to justify your choices. We only have one life, and we need to make the most of it.