Don't label people. Truly charismatic people take the opinions and points of all people they meet into advisement. Do so, and you'll win their respect and maybe learn something. Put your best face forward. Beauty is skin-deep.
True beauty is on the inside . . .
While there's certainly truth to these statements, your professional appearance does count. Even if you'd personally choose the latter, take those extra minutes with your hair or attire. Not only will you impress others you'll also feel better about yourself . . . Say something when you speak. Being able to articulate is one of the most prized skills.