I've really liked Amanda, (Malcolm in the Middle's Mum), but she's after Howard in a huge way, and I like him too. I fear this might be her downfall, if he finds out.
Also, she likes to do those funny things in the diary room. Only Britney could get away with that. Amanda's seem a bit contrived.
Britney -
http://www.youtube.com/watch?v=QBa9n45_Fwo
Helen has played good but she's also annoying. When she was HOH she demanded "TRUTH" from everyone.
I'm still eager to see if Elissa can play anything like her sister. So far she stays quiet and smiles and twirls in the mirror too much.
I'd like to see Andy, Judd and Howard go far.