You start noticing different stuff
Before kids I never paid attention to playgrounds or family friendly restaurants or how many outlets a coffee shop has. Now those are the first things I notice about any place. My brain just auto-scans for kid stuff. Also I can't watch certain movies or shows anymore because I think about my kids and how they'd react to it. It's like a completely different lens on the world that I didn't choose but can't turn off.
You start rating restaurants purely on whether they have a good kids menu and if the noise level won't make the baby freak out. Gone are the days of just picking a place because the food is good.