One of the great myths in America is that sports build character. They can and they should. Indeed, sports may be the perfect venue in which to build character. But sports don't build character unless a coach possesses character and intentionally teaches it. Sports can team with ethics and character and spirituality; virtuous coaching can integrate the body with the heart, the mind, and the soul.
Until a character becomes a personality it cannot be believed. Without personality, the character may do funny or interesting things, but unless people are able to identify themselves with the character, its actions will seem unreal. And without personality, a story cannot ring true to the audience.