The truly toxic combination of traits GW Bush brought to decision making was:
2) Lack of curiosity
That is, he was not broadly informed to begin with (point 1). He did not seek out new information (#2); but he nonetheless prided himself (#3) on making broad, bold decisions quickly, and then sticking to them to show resoluteness. We don't know for sure about #2 for Palin yet -- she could be a sponge-like absorber of information. But we know about #1 and we can guess, from her demeanor about #3. Most of all we know something about the person who put her in this untenable role.