I think I need a new sketchbook for this.
http://www.channel4.com/bigbrother/
I think my favourite so far is Totally Negative 'Exercise Scientist' Dawn, who at least seems intelligent enough to hate the world...unless it's just a shtick. There's also Pete the Tourettey cartoonist... You usually end up loathing the ones you thought were OK at first most, though.
It certainly looks like everything is rigged for maximum discomfort and humiliation value...and yet...if I got a 'golden ticket' in a KitKat, I'd be quite keen to find out what it's really like.