Being yourself?

People say to be yourself,  I say, be a better self. I don't want to be the whiney, negative, sloppy and lazy  bastard. I want to be sure, positive, presentable, and diligent gentlemen. I try to change it, little by little. Yes, its true, its a big change, but having to actually like what I have now and instead of waiting till I loose weight/older/finish study is a better choice for now. Accept what I have now, and prepare for the future