I think you do have a point. Kerr reminded me alot of Tyson for some reason. Mentally he was very easy to crumble and thrived completely on the response he'd get from his fans and the illusion the drugs gave him. Mark on the other hand was for want of a better word a consumate meathead with a cast iron will who refused to listen to what any of the naysayers had to say. But then he also had a family to feed.