TryForce's right, try to put more polies into the hair and definie them more, do something with the cloths on chest, vegeta has clothes very close to body, but the effect of it should be made with skin not with model. Arms are too big, there are bigger than muscles on leg, come on make em less buffy.Upper legs are too tiny for me, make em more defined... I don't know... torso is probably to short... but try first to make arms less buffy, than we'll see...
If you really want clothes to be defined by muscles you have to make whole body more defined not only the chest but also torso and legs...
Good start, use my hints and we'll see... GJ man
EDIT: Can you show wires and face zoom??