<<He will , if he becomes president , become the worlds most powerfull leader , with little testing in his life to prepare him for it.>>
Well, in this campaign already, I've seen that Obama gives cautious, thoughtful and nuanced answers whereas McCain is over-simplified, short and quick. Georgia being just one example.
On the One Big Issue (the Iraq war) McCain was dead wrong and Obama was right. McCain, the "maverick," followed the herd and Obama stood out against it and said "No." That combined courage and foresight.
I don't think there's a real contest in leadership. Obama as a law professor is careful and analytical. He can't be rushed into anything. So far none of the decisions taken by Bush required instant action, so the question of who's best to make snap decisions when there's no time for deliberation or analysis doesn't have any real application, and since McCain is a lot older than Obama and nowhere near as familiar as he is with analysis of complex problems, I'd trust Obama to make a better snap decision, should the occasion ever arise, than McCain. But for the 99.9999 % of all executive decisions that don't have to be made in an hour or less, I'd be much happier with Obama since he's clearly a much more intelligent man than McCain, and much more familiar with complex arguments and complex considerations of complex cases.
We live in a complicated world. You can't make a snap decision and expect it will work out. Complex situations and complex problems demand careful analysis and rational thought, a balancing of long-term and short-term considerations. Who's better qualified to make decisions, McCain or Obama? It's really a no-brainer. I really don't see how anyone, thinking now impartially and without bias, could think even for a second, that McCain would even come close to being Obama's match. Go with the smart guy, not the dummy.