Jack's biggest problem is that he's young and out of his depth, only really speaks up behind people's backs and made some mistakes like starting to believe his own hype and get too big for his boots. But overall he's not a bad guy and was actually entertaining the last few days in his hotel manager role.
Danny is pure poison and a terrible person. He's essentially a professional fake, popping up on multiple reality shows and has carefully cultivated this hero image in his pursuit of the prize money and fame. It's mostly only when he's drunk (and he's a bad drunk who can't hold his liquor) when the facade starts to slip and the true nasty, aggressive him starts to come out.
Aisleyne is just a caricature of herself at this stage, and is starting to display what appears to be some pretty serious mental health issues. It's kind of sad to watch, but she's such a vile, wretched drunken mess that most of the time you're hoping that she'll just go completely nuts to the point where the help she so obviously needs is forced upon her.
