It may seem cliché to say that my mother is the person who has had the most significant influence on my life.
^It really is. And the reasons you have provided are rather cliched as well, because mothers do typically have 'postive effects' on their children and do try and teach us to be good.
From your essay, your mother seems to have done pretty much what most mothers do. Therefore, there is nothing unique as such about this essay.