Okay obviously I agree with Jo on that, however I stand by thinking that Lucius was a good father. He was worried about Draco at the end of DH and in the hall all of them were acting as a family, besides you never saw Lucius being outright abusive, there was never any mention of him actually abusing Draco, just of him being strict and by the way Draco acted and talked about his father it didn't seem as if he was a bad father and Draco seemed unhappy that Lucius was in Azkaban as if he missed his father. I think that when Draco was younger he would have been well taken care of by both his parents, Lucius didn't seem all too obsessed with getting Voldemort back did he? I think once Voldie was back at first things may have changed and in public he may have been cold towards his son however I believe in private the Malfoys were a different family. As if they could act how they wanted without public scrutiny.

However this is just my opinion.