To a large degree, since the beginning of time, charisma or the lack of it has impacted upon those in quest of acclaim. As media expands, this has become ever more vital. Thus, demeanor if unappealing, can defeat one's likelihood of success, causing the death of prospects whilst they are still embryonic.
For a man to conquer himself is the first and noblest of all victories... The first and greatest victory is to conquer yourself; to be conquered by yourself is of all things most shameful and vile.
The key to realizing a dream is to focus not on success but significance - and then even the small steps and little victories along your path will take on greater meaning.