When is it appropriate to be nice to other people? My answer is of course, ALWAYS! Why would you not want to be nice?
I've heard folks say things like "it's the style these days to appear uninterested." I heard someone else one say "Always being nice is just not my style."
Is this some sort of fashion statement? Are we talking about the latest trends? Are other people being nice? How would it look if everyone was nice? Oh my!
Allow me to let you in on a little secret, and do feel free to share this widely. (Of course then it won't be a secret anymore, but that's the idea). Nice is never out of style!