Yes, he is one of those people that allows some less than desirable traits to show through ...not to say he doesn't have any good qualities, there are times in his life when he has truly stepped up, but I can count only a handful and they tend to get lost in the crowd of other behaviours he has displayed for the most part.  I have 1 older and 1 younger brother (biologically speaking the younger one is my half brother)...the older one looks like the few males on my mother's side but behaves like our father....and the younger one is the spitting image of his father, bit of a black sheep personality wise though...