Although I disagree with Palin's religious beliefs (as I am an agnostic, she is a devout Christian) I don't think she is "crazy" as she has been depicted by the media. Based on how she governed the state of Alaska, she was very moderate (obviously, still right of center) and seemed to do more good than bad. (She actually fought against corruption in her own party, and got some corrupt republican politicians to resign and be punished, so she at least has some ethics).
So while I don't agree with some of her social policies, the McCain/Palin ticket still offers a far better economic platform in comparison to Obama/Biden.
Also, I think Biden may be the worst of all of them... he just hasn't achieved any sort of celebrity and has avoided media coverage. But wow, the things he says are so very stupid.