I disagree, Tanuki. I think the Lucius is abusive. I don't think he's ever hit Draco (besides maybe a spanking or something, but even that I doubt, wouldn't want to bruise his palm...) or Narcissa. I see him as being verbally abusive. Always expecting the absolute best and if he's disappointed then just giving Draco hell. (Ahem, his course tongue towards Draco in Borgin and Burkes in CoS.)
He does spoil Draco, there's no denying that, but that doesn't mean that he isn't abusive. He'd need to have encite a certain amount of fear in Draco for Draco to be so loyal and reliant. Fear beyond just fearing disappointed daddy, but fear of what he'd do if he were disappointed.