The shaved head can mean two things. One is that you are going bald but you are not embarrassed or scared to accept the fact. It shows that you would go completely bald rather than doing the comb over to hide the fact. Second this is that you really feel that going for a completely bald look is better for your style and physique and therefore you have taken this brave step. Whatever the reason, it clearly shows that you are not afraid to embrace the change.