To me, they're not. I can't take fake. I have a neighbor that is so completely fake and plastic that I cringe when I see her coming or her number comes up on my caller i.d. I know for a fact that she disparages me behind my back, but she's as sweet as pie to my face... even ends every conversation with, "I love you". It's all I can do not to vomit.
The fake attributes that people have are so appealing because they reflect what every person wants for instance confidence and success. In addition, the plastic attributes make the person look stress free and happy and in our society those are very attractive qualities.