Why are some people nicer than others?

I think it all depends on the environment they grew up in, the support or lack thereof, and just how they were raised.

I think some people are passive more than anything but there’s those that are genuinely kind. Anybody can be nice if they really try though.

Some have hearts

education,upbringing,friends make the difference

Social intelligence, not being self-centered.

That's how human beings roll......

some get their panties in a bunch. those who don't wear any are the nicest 🙋

Depends on your def of "nice". Some are fake and wanna be liked others are more real and not so kiss ass.

some people are not surrounded by assholes, and that helps out alot. LOL