Palin = ESTP
I think it's quite clear that Palin is an ESTP, "The Promoter", just like John McCain. McCain is very narcissistic like many polititians. So, it stands to reason that he'd select his same type on an impulse, which is the way xSTP types usually make decisions. A lot of people in here are claiming that Palin is an ESTJ, but I can't see that at all. Hillary Clinton is obviously an ESTJ personality (known for a fact), and Palin has no similarities to her at all. xSTJ's are very "service" motivated and they have a strong desire to be "accepted" by the group. Palin exhibits none of these qualities that I can see. Palin's "beauty queen" past is also a tipoff. ESTP's love being "on stage", and being the center of attention. However this type is prone to become very arrogant and even sociopathic when given real power, because they almost completely lack any empathy and feeling for humanity generally (F), and they're very deficient of intuition (N) to provide personal depth and a historical perspective on events and times. They're essentially there for "the show", and also to have everything entirely the way they think things should be. They are very, very poor characters for providing genuine leadership in a true democracy (i.e. George W. Bush, also an ESTP).