How cool is being nice? Think about it. When was the last time you got mad because someone was nice to you? Seriously. Give me nice anytime! It's so good we urge people to have a nice day!
Mean and nasty? Nope. You can keep it. Nice though is welcome anytime. It goes well with all kinds of weather. It doesn't care about where you are going or what you are doing. It doesn't matter what you ate for breakfast. It doesn't care how you are dressed. Being nice is never out of style.
In life there is good and there is bad. I suppose there is also a grey area in between. Nice is certainly on the good side. I never tire of nice.
If you are currently being nice, try it. I think you will really like the results!