Tomboy esthetics depend on appearance as a whole. Pose is important aspect in the expression. Poses with shoulders swaying back and hips forward -- the opposite of the feminine 'straight' pose with bosom forward -- seems particularly important.
Sick of constantly having to untangle a knot in you long hair? An inverted bob is the answer. Unlike regular bobs, inverted bobs (also know as graduated bobs) are short at the back and long in the front.