With character flaws, I think there is a distinction between those one is willing to change and those one accepts about oneself/unwilling to change. I have some that I acknowledge but that do not bother me/my relationships enough to change. Others I compromise on. I do not think they are so essential that I cannot change, but certainly there are some I am unwilling to change. I guess I do not believe the ones I am unwilling to change are actually flaws. Others, of course, may disagree.