Yes! I have a blog post that's been sitting in my draft folder for a month, waiting for me to have brain enough to finish it, that's on this very topic.

I feel like, if nice is all you're aiming for, you aren't striving enough. Be kind! Be compassionate! Be courteous (there's another one not used often enough)! Be gracious! Be brave! BE FUN!

Don't be nice. Nice is too bland. Niceness won't ever change the world, or even you.