Don’t you want to be a better person?
What about a nicer one?
There’s nothing wrong with niceness—it’s just I’d rather be godly.
C.S. Lewis explains it well:
“Niceness”—wholesome, integrated personality—is an excellent thing. We must try by every medical, educational, economic, and political means in our power to produce a world where as many people as possible grow up “nice”; just as we must try to produce a world where all have plenty to eat. But we must not suppose that even if we succeeded in making everyone nice we should have saved their souls. A world of nice people, content in their own niceness, looking no further, turned away from God, would be just as desperately in need of salvation as a miserable world—and might even be more difficult to save. (Mere Christianity, Kindle location 2642)
Niceness isn’t a bad thing; as Lewis says, it’s an “excellent thing.” But being a nice person is a poor substitute for being a godly one.
If I had to choose between the two, I’ll choose the latter every time.