oh I agree Jwarner. I don't think he appears to be calculating, or self-serving. More the opposite. I wouldn't be surprised if he has episodes where he loses control or even awareness, there could be rage during the episodes, or maybe not. I thought he looked dazed and confused standing at the door. Of course the NG types like to insist he's a "Psychopath" (i.e. aware of what he's doing, antisocial personality), (and he could be), but schizophrenic or manic episodes, and a few other conditions, would have to be ruled out and we'd have to know a lot more about his behavior and history before we could come to the conclusion that he's sane or a psychopath. Of course with schizophrenia and mania it's pretty common for those to have their first onset when the person is in their early 20s, so I wouldn't be surprised.
Talking about the gestures he does with his hands like the interesting limp hand in the coffee video, standing there looking kind of dazed and helpless, not to mention the tapping or rapping on the door (could have been a staging kind of thing, pretending to be locked out, but then why not close the door first before doing it at least....and the tapping could have been something else, it looked weird and confused.).... in the Thailand video I thought I saw him do a strange involuntary-looking little hand flutter gesture at one point. I'm not sure, I would have to watch that again to have a closer look. I also noticed in videos when he talks he gestures mostly with his left hand, lots of movement and expression with his left hand while talking, you would think he's left-handed, but he appears to write with his right hand. Not important, just unusual little things, it's weird what catches your eye when you watch the videos. The hand flutter from the Thailand video, and the tapping on the door in this video made me wonder.
Speak of body language, I noticed that Stephany seemed to be almost stumbling slightly when she approached the table in the casino where he was sitting. I wondered what was making her kind of drag and almost stagger a bit like that, at first I thought, omg she was drugged or impaired somehow, but I guess she might have just been exhausted from being up all night