What Does This Tell Us?

It's useful to judge the veep picks as an insight into how the two presidential candidates make decisions. A reader sums it up:

Looking at these two events, what do we see?  Obama is cautious, conservative and highly deliberative in his approach.  McCain is a risk-taker, indeed, even a bit rash.

In a world of Jihadist terror, resurgent great power politics, and proliferating WMDs, who are you more comfortable with? And how eager are you to roll the dice?