People who don't like the PS3 design, how would you have preferred it to look then?
I suspect people disliking the design, dislike it only because it differs from the norm, like they would dislike almost any new deviating design.
People don't really know what they like, history has shown that time and time again.
They may say they dislike something at first, with words and their "intellect", yet deep down the subject has sparked some positive interest, and after some time they act as though they always liked the subject.
I think the PS3 case is a brilliant design. Definitely the best console design ever, by a large margin.