I am a Whovian. Always have been, and I always will be. And the Doctor, in my eyes, perfectly embodies the difference between “niceness” and “kindness.”
In the Twelfth Doctor’s final speech, delivered with great emotion by one of the best actors to have played the role, he makes a distinction between being nice and being kind. The latter of which he places the emphasis on, and he’s right to do so. Nice is not the goal. Kindness is.