I finished the last episode. During the last 10 or so episodes it was obvious to me that they ending wasn't going to be very clear. So, Johann is this monster that wants to commit the ultimate suicide. I understand that he had a crappy childhood, but apparently not as bad as his sisters', and she turned out fine. Does he just have severe depression or something? There was never really an incident pointed out that caused Johann to be a psycho. He just is. I guess that's fine, but I was hoping for more.
Oh, and I'm assuming he was in a coma in the last episode and awoke/escaped. How annoying. You'd think they would monitor a killer like him rather than put him next to a window that could easily be escaped from, despite him being in a coma. And with Tenma's vision of Johann explaining the Red Rose Mansion thing, where their mother couldn't make up her mind about which twin to give to Klaus: Is Johann supposed to have psychic powers or something? Tenma was obviously freaking out and seeing Johann speak the truth about something that Tenma couldn't possibly know about, yet when Tenma snapped out of it, Johann was still just lying there. What the hell. I mean, it's fine, but just doesn't live up to the buildup/plotline of the rest of the series.