They find plenty of "normal" stable personalities and put them on the show. However, being put on lockdown in a house for 3 months with half-a-million dollars on the line tends to turn most of them into lying, back-stabbing, raving lunatics. Thats what makes the show so awesome. This show wouldn't have made it past season 1 if everyone in the house was "Jordo-bot" all the time. (BTW, I also think its awesome when people do overcome the insanity...everone handles it differently.) About Cassie..sure, she's hottt!!! Until she starts chomping gum with her mouth wide open like a horse chewing its cud...and talking at the same time. She is definitely a "from the neck down" type of girl.