I was taught in school to never use the word "nice", because it's bland and lacks description.
Therefore, I can't really say what it is.
There can be nice bananas, nice weather, nice pictures, or I suppose nice people.
I have no idea what that means.
For instance I like dark wet weather.
That's "nice" in my opinion but others would disagree.
Kind comes from "kindness" which shows that the person is considerate of others.
The recipient judges whether or not someone is kind to them, not the giver.
Bananas, weather, and pictures can't be kind.
_________________
I never give you my number, I only give you my situation.
Beatles