Jack says somewhere in this forum that some times the good qualities skip a generation only to re-appear in the next one. I guess it depends what you have in hand and access to, how hard cull you intend to do and goes on and on. Very close inbreeding and hard cull is a way to get rid of flaws. Of course there is always the oposite stand that does make sence. I guess everyone is judged by the final result, so...