first the neck is always placed in the center of the head
in front view you made a smiling emotion and in quarter view you made the face in a serious look or giving an irritating look or something.
well the only thing that made it like that is because of the eyebrows.
and the right eye is too much pointy..
when eye brows are close to the eyes it will give a character a more serious look.
well they don't look much different in quarter view and front view if you ask me, it's just the emotion
and in side view. there are a lot of styles in side views so i don't really know what you want it to look like. but if you ask me, that isn't the correct shape of it, though it's just in my style though.
i'm sure gunzet or rio can add some more advise.